Learn English – Is it “give a credit for” or “give credit for”

My first language does not have articles, and I am really struggling to understand why people sometimes use them and sometimes do not. I understand general rule that "the" means one specific thing and that "a" means one (but not specific), but still in many situation I see people use "the" for plural, or they do not use article at all.

Please can you explain for the following case is it:

"give a credit for"

or

"give credit for"

"credit" in this case is "commendation" or "honor". ("give credit for idea")

I googled it and saw that majority of the results are "give credit for" but I do not understand why.
What am I missing?

Is it because credit used as honor is uncountable?