inlay vs intercalate

inlay

verb
  • To place (pieces of a foreign material) within another material to form a decorative design. 

  • To place an inlay in a tooth. 

noun
  • The material placed within a different material in the form of a decoration. 

  • A filling for a tooth, made of ceramic or gold to fit the cavity and shape of tooth and cemented into place. 

  • The piece of paper or the booklet inside the case of a compact disc, DVD, or cassette. 

intercalate

verb
  • To insert anything somewhere (especially between other things), such as an affix into a word. (Compare interpolate.) 

  • To insert an extra month into a calendar for the same purpose. The Hebrew calendar has such a month. 

  • To insert a substance between two or more molecules, bases, cells, or tissues. 

  • To insert an extra leap day into a calendar in order to maintain synchrony with natural phenomena. 

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