thrift vs unthrift

thrift

verb
  • To obtain from a thrift shop. 

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

  • A savings bank. 

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

unthrift

adj
  • Unthrifty. 

noun
  • A lack of thriftiness; prodigality. 

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