analgesic vs aperient

analgesic

adj
  • Acting to relieve pain; being an analgesic. 

  • Unable to feel pain. 

noun
  • Any medicine, such as aspirin, that reduces pain, especially without inducing a loss of other sensation. (Contrast anesthetic.) 

aperient

adj
  • Having a gentle laxative effect. 

noun
  • A laxative, either in the form of a medicine or a food such as asparagus or hops, which has the effect of moving the bowels, or aiding digestion and preventing constipation. 

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