eccoprotic vs purgative

eccoprotic

noun

  • A mild laxative. 

adj

  • Having a mild laxative effect. 

purgative

noun

  • something, such as a substance or medicine, that purges; laxative 

adj

  • purging 

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