quitter vs yielder

quitter

noun
  • One who quits. 

  • Matter flowing from a wound or sore; pus. 

verb
  • To suppurate; ooze with pus. 

yielder

noun
  • Someone or something that yields, or gives way. 

  • Someone or something that yields a crop or other product. 

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