parturient vs preg

parturient

adj
  • In labour, about to give birth, or having recently given birth. 

  • Of, related to, or caused by childbirth 

  • Facilitating labour. 

  • About to create a new product, or float a new idea. 

noun
  • A substance that facilitates labour. 

  • One who is in labour, who is about to give birth, or who has recently given birth. 

preg

adj
  • Pregnant. 

noun
  • Pregnancy. 

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