caterpillar vs midget

caterpillar

noun
  • The larva of a butterfly or moth; leafworm 

  • A vehicle with a caterpillar track; a crawler 

  • A set of subtrees of a tree 

midget

noun
  • A little sandfly. 

  • A normally-proportioned person with small stature, usually defined as reaching an adult height less than 4'10". 

  • A small version of something; miniature. 

  • Any small swarming insect similar to the mosquito; a midge. 

  • Any short person. 

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