harvest mite vs twitch

harvest mite

noun
  • Any of various mites of the genus Trombicula that inhabit forests and grasslands and which, in their larval stage, attach to various animals including humans and feed on skin, often causing itching. 

twitch

noun
  • Action of spotting or seeking out a bird, especially a rare one. 

  • A stick with a hole in one end through which passes a loop, which can be drawn tightly over the upper lip or an ear of a horse and twisted to keep the animal quiet during minor surgery. 

  • A brief, small (sometimes involuntary) movement out of place and then back again; a spasm. 

  • A brief, contractile response of a skeletal muscle elicited by a single maximal volley of impulses in the neurons supplying it. 

  • The sudden narrowing almost to nothing of a vein of ore. 

  • A trip taken in order to observe a rare bird. 

  • couch grass (Elymus repens; a species of grass, often considered as a weed) 

verb
  • To spot or seek out a bird, especially a rare one. 

  • To jerk sharply and briefly. 

  • To cause to twitch; spasm. 

  • To perform a twitch; spasm. 

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