cous vs cuz

cous

noun

  • cousin (usually as a term of address, but not necessarily towards one's cousin) 

cuz

noun

  • cousin (usually as a term of address, but not necessarily towards one's cousin) 

conj

  • because 

adv

  • because 

How often have the words cous and cuz occurred in a corpus of books? (source: Google Ngram Viewer )