carcinogenic vs healthful

carcinogenic

noun
  • Synonym of carcinogen 

adj
  • Causing or tending to cause cancer. 

healthful

adj
  • Beneficial to bodily health. 

  • Conducive to moral or spiritual prosperity; salutary. 

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