lifeline vs redemption

lifeline

noun
  • A source of salvation in a crisis. 

  • A particular crease in the palm. 

  • A line from the diver to a tender at the surface control point. 

  • A line to which a drowning or falling victim may cling. 

  • A means or route for transporting indispensable supplies. 

  • System or structure of vital importance to a community. 

  • On the deck of a boat, a line to which one can attach oneself to stay aboard on rough seas. 

redemption

noun
  • Salvation from sin. 

  • The act of redeeming or something redeemed. 

  • The recovery, for a fee, of a pawned article. 

  • Rescue upon payment of a ransom. 

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