chastise vs lifeboat

chastise

verb
  • To punish (someone), especially by corporal punishment. 

  • To castigate; to severely scold or censure (someone). 

  • To lightly criticize or correct (someone). 

lifeboat

verb
  • To rescue; to carry to safety 

noun
  • A boat especially designed for saving the lives of shipwrecked people or people in distress at sea (either launched from the shore with a crew, or else carried on board a larger ship). 

  • An emergency vehicle carried aboard a spaceship. 

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