painless vs stinging

painless

adj
  • Free from pain; without pain or trouble. 

  • Not difficult; easy. 

stinging

noun
  • The act by which someone receives a sting. 

adj
  • Having the capacity to sting. 

  • Precise and hurtful. 

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