aphid vs mosquito

aphid

noun
  • Sapsucking pest insect of the superfamily Aphidoidea; an aphidian. 

mosquito

noun
  • A small flying insect of the family Culicidae, the females of which bite humans and animals and suck blood, leaving an itching bump on the skin, and sometimes carrying diseases like malaria and yellow fever. 

verb
  • To fly close to the ground, seemingly without a course. 

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