doodlebug vs rolly polly

doodlebug

noun

  • A woodlouse. 

  • An automobile converted into a cheap tractor for a small farm during the Second World War. 

  • Someone who draws constantly. 

  • An idiot. 

  • A slackard or time-waster. 

  • The V-1 flying bomb. 

  • An antlion larva (Myrmeleontidae). 

  • A divining rod or similarly intended device. 

  • A term of endearment. 

  • A cockchafer (genus Melolontha). 

rolly polly

noun

  • A woodlouse. 

  • A forward roll or a backwards roll. 

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