abortifacient vs abortion pill

abortifacient

noun

  • A drug or an agent that induces an abortion. 

adj

  • Producing miscarriage. 

abortion pill

noun

  • A drug, such as mifepristone (Mifegyne), used to terminate a pregnancy in its earliest stage. 

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