caulking vs mastic

caulking

noun
  • A sealing material used to seal joints between heterogeneous materials in many kinds of construction and manufacture. 

mastic

noun
  • A flexible, waterproof cement used as an adhesive, sealant or filler. 

  • An evergreen shrub or small tree, Pistacia lentiscus (mastic tree), native to the Mediterranean. 

  • An alcoholic liquor flavoured with this resin. 

  • A hard, brittle, aromatic and transparent resin produced by this tree and used to make varnishes and chewing gum, and as a flavouring. 

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