I recently opened this question in biology.stackexchange.com and from comments it looks like it's better posted in this community (which I agree) so I'm posting it here again:
I'd like to know an approximate rate for the most common ones when giving/receiving oral sex. What I find is just pages that say that infection is possible but those pages don't go into too much detail about how possible it is.
The only study I have found more precise is one that estimates that the risk of contracting HIV by oral sex is pretty low, but that even that is not clear.
I believe it shouldn't be too common to get infected by an STD this way, but maybe my hypothesis is wrong.
Finding that rate for every possible STD could be a too demanding job, so it's enough for me finding the average rate for the most common STDs.