dragoon vs mackerel

dragoon

noun
  • A variety of pigeon. 

  • A carrier of a dragon musket. 

  • A horse soldier; a cavalryman, who uses a horse for mobility, but fights dismounted. 

verb
  • To force (someone) into doing something; to coerce. 

  • To surrender (a person) to the fury of soldiers. 

mackerel

noun
  • A true mackerel, any fish of tribe Scombrini (Scomber spp., Rastrelliger spp.) 

  • Certain smaller edible fish, principally true mackerel and Spanish mackerel in family Scombridae, often speckled, 

  • typically Scomber scombrus in the British isles. 

  • Certain other similar small fish in families Carangidae, Gempylidae, and Hexagrammidae. 

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