lasting vs provisional

lasting

adj
  • Persisting for an extended period of time. 

noun
  • A durable woollen material formerly used for women's shoes. 

  • The act or process of shaping footwear on a last. 

provisional

adj
  • Temporary, but with the intention of eventually becoming permanent or being replaced by a permanent equivalent. 

noun
  • A postage stamp issued locally before an official issue is released. 

  • An interim denture. 

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