mucker vs yaar

mucker

noun
  • Friend, acquaintance. 

  • A person who removes muck (waste, debris, broken rock, etc.), especially from a mine, construction site, or stable. 

  • A comrade; a friendly, low-ranking soldier in the same situation. 

yaar

noun
  • A friend, pal, or buddy. 

  • lover 

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