placentone vs prog

placentone

noun

  • Synonym of progesterone 

prog

noun

  • Progesterone. 

  • Progressive rock. 

  • A progressive. 

  • A program. 

  • A pointed instrument. 

verb

  • To programme. 

  • To prognosticate; to forecast. 

  • To prick; to goad; to progue. 

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