appulse vs quiver

appulse

noun
  • A close approach of two heavenly bodies; a conjunction or occultation. 

  • An energetic movement towards or against something; a push, a strike. 

quiver

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. 

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

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