"tread on" or "tread upon"?

In 48% of cases tread on is used

The floors look like kids never trod on them.

It would not tread on grain nor eat living things.

I felt like treading on new and unfamiliar grounds.

I was the only male in the room, and I knew I would be treading on some slippery ground.

He who makes the morning darkness, and treads on the high places of the earth; Jehovah, the God of Hosts, is His name.

He hated how people rushed too, how they never paused to let others off, and how they trod on his feet as they entered the train.

However, the seaweed provides a livelihood for many of the locals who farm it and sea urchins can be fascinating, just don't tread on one!

Before I get trodden on this for example: Why did your government publicly moot the idea of halfing sentencing for wait for it -Rapists who admit guilt.

Not only have we seen all and sundry claiming struggle credentials we have seen these very individuals using this as a licence to tread on the rights of others.

It had that sense of surrender (' worshipped the ground he trod on ' ), and a heightened awareness, as of brilliant colour bursting upon a black and white world.

In 16% of cases tread upon is used

I noticed indeed that our feet tread upon a solid surface, while our nostrils breath a.

It was actually a piece of silver--a tiny piece trodden upon by many feet, but still with spirit enough left to shine a little.

Top authority, however, as bone-headed as usual, had recently trodden upon me hard for daring to entertain so expensive a notion.

A person fears to tread upon the floor as he would be afraid of treading upon running water, though in reality the floor is only paved with smooth transparent slabs of glass.

In 10% of cases tread in is used

If you come across any stones or treads in the flint, remove them.

Rajinder helped his brother sit on a buffalo and tread in chest deep water to reach that place.

His righteousness, the truth of his promise, shall be unto children's children, who tread in the footsteps of their forefathers ' piety.

In 3% of cases tread by is used

Dimmesdale were really going to die, it was cause enough, that the world was not worthy to be any longer trodden by his feet.

Graham Ford, Sri Lanka's coach, marched into the match referee's room to demand an explanation, following a route trod by his England counterpart, Andy Flower, earlier in the Test.

In 3% of cases tread through is used

I've been treading through sites and found nothing but strictly to the book people who will copy and paste the answer I'd looking for.

In 3% of cases tread under is used

Her matronly fame was trodden under all men's feet.

In 3% of cases tread with is used

Some were drenched in a tasty Jack Daniel's BBQ sauce (sweet, sour and smoky) and the others in a suicidal Buffalo sauce (really spicy, tread with caution).

In 2% of cases tread at is used

But the Mail believes this is an icy downhill path, which we tread at our utmost peril.

In 2% of cases tread into is used

We must be cautious and not tread into doubtful matters - which was another one of the beautiful and noble characteristics.

In 2% of cases tread over is used

Did they manage to tell interesting stories given that they got a chance at a fresh start? Or did they simply end up treading over the same ground, not as well.