bedbug vs matki

bedbug

noun
  • A small nocturnal insect (Cimex lectularius), of the family Cimicidae, that feeds on the blood of humans and other warm-blooded hosts. 

matki

noun
  • The plant Vigna aconitifolia, moth bean. 

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