ya vs yessum

ya

intj

  • Go. (Spoken to horses and cattle.) 

  • Yeah; yes. 

adv

  • yea; yes 

noun

  • A letter of the Cyrillic alphabet: Я, я. 

yessum

abbrev

  • yes ma’am (also used, somewhat less commonly, when speaking to a man) 

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