quiver vs skip a beat

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. 

skip a beat

verb
  • To experience a strong emotion. 

  • To miss a beat. 

  • To momentarily falter. 

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