life savings vs thrift

life savings

noun
  • A large sum of money one has saved over a considerable number of years. 

thrift

noun
  • A savings bank. 

  • The characteristic of using a minimum of something (especially money). 

  • Any of various plants of the genus Armeria, particularly Armeria maritima. 

verb
  • To obtain from a thrift shop. 

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