For citing using the Turabian or Chicago format, do you have to put a subscript and a footnote at the end of every sentence? If not, if you have two sentences that belong to the same source, would you put the footnote at the end of the second sentence like in-text citation?

I'm not familiar with either one, but this website should help:

https://owl.english.purdue.edu/owl/section/2/12/