hoard vs siphon

hoard

verb
  • To amass, usually for one's own private collection. 

noun
  • A cache of valuable objects or artefacts; a trove. 

  • A hoarding (temporary structure used during construction). 

  • A hidden supply or fund. 

  • A hoarding (billboard). 

  • A projecting structure (especially of wood) in a fortification, somewhat similar to and later superseded by the brattice. 

siphon

noun
  • A bent pipe or tube with one end lower than the other, in which hydrostatic pressure exerted due to the force of gravity moves liquid from one reservoir to another. 

  • A soda siphon. 

  • A tubelike organ found in animals or elongated cell found in plants. 

verb
  • To transfer (liquid) by means of a siphon. 

  • To steal or skim off money in small amounts; to embezzle. 

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