How do you benchmark training?

A benchmark is a standard by which something can be measured or judged.

There is not really a way to make the word 'training' plural. It is in present tense, so you would say, "She is training." It might be that it needs to be worded differently, into "She trains" or...

for math you use 0 1 or 1half

When used as a noun, the word training is an uncountable or mass noun, so has no plural form. The word training can also be used as a verb or adjective. He needs some more training. (mass noun) He...

training (activity leading to skilled behavior)