quiver vs thresh

quiver

verb
  • To shake or move with slight and tremulous motion. 

noun
  • A multidigraph. 

  • A ready storage location for figurative tools or weapons. 

  • A container for arrows, crossbow bolts or darts, such as those fired from a bow, crossbow or blowgun. 

thresh

verb
  • To violently toss the limbs about. 

  • To beat soundly, usually with some tool such as a stick or whip; to drub. 

  • To separate the grain from the straw or husks (chaff) by mechanical beating, with a flail or machinery. 

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