quiver vs throb

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. 

throb

verb
  • To vibrate or pulsate with a steady rhythm. 

  • To pound or beat rapidly or violently. 

  • To pulse (often painfully) in time with the circulation of blood. 

noun
  • A beating, vibration or palpitation. 

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