Quite a lot

I’m not “that” kind of a person

A lot, because I "know" exactly "how" to "use" them "properly", no doubt about that.

whenever I cite a source's exact words (looks nervously at professor over shoulder)

A lot. It probably shows most of my thoughts and ideas are unoriginal and I'm not a very creative person.

“Often”.

When I'm quoting something or making it clear I think said phrase/word is a load of bullshit.

My recent story I wrote contained it in almost every line of text.

not even

Often.