centrifugal vs spasmodic

centrifugal

adj
  • Tending, or causing, to recede from the center. 

  • Expanding first at the summit, and later at the base, as a flower cluster. 

  • Having the radicle turned toward the sides of the fruit, as some embryos. 

noun
  • A rotating machine used to separate massecuite into sugar crystals and molasses. 

spasmodic

adj
  • Erratic or unsustained. 

  • Convulsive; consisting of spasms. 

  • Intermittent or fitful; occurring in abrupt bursts. 

  • Of or relating to a spasm; resembling a sudden contraction of the muscles. 

  • Of or relating to the spasmodic poets, a group of British Victorian poets who wrote introspective drama in verse. 

noun
  • A medicine for suppressing spasms. 

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