blab vs tone down

blab

verb
  • to speak carelessly or excessively 

  • To tell tales; to gossip without reserve or discretion. 

noun
  • One who blabs; a babbler; a telltale; a gossip or gossiper. 

  • Gossip; prattle. 

tone down

verb
  • To make a television program, piece of writing, etc. less offensive and so more suitable for a family audience. 

  • To moderate or relax; to diminish or weaken the striking characteristics of; to soften. 

  • To relax; to make quieter or less obtrusive; to make milder. 

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