There are a lot of violations for swimming free but here are some: you must keep your arms moving at every point, you can not touch the lane rope, when doing a flip turn you can not stop and lift your head to take a breathe. Those are the most common :)
No, the freestyle stroke is generally faster than the butterfly stroke in swimming.
The most popular and fastest freestyle stroke in swimming is the front crawl.
1899
The main difference betwwen freestyle and back stroke in swimming is that freestyle is done on your stomach, and backstroke is done on your back. Freestyle is also a much faster stroke than back stroke.
Schwimmbad
any way you want
There is no such swimming event. Theoretically, if there was, it would be a relay of 2 people, each swimming 100 yards freestyle.
swimming, as in lap swimming. freestyle, back, breast, and butterfly.
Late 1800's
It is the fastest.
It is freestyle
swimming freesTYLE