decare vs virgate

decare

noun
  • A unit of surface area equal to 10 ares (that is, 1,000 square metres, 0.10 hectares, or approximately 0.25 acres) 

virgate

noun
  • The yardland: an obsolete English land measure usually comprising ¹⁄₄ of a hide and notionally equal to 30 acres. 

adj
  • Rod-shaped: straight, long, and thin, (particularly botany) the habitus of plants with straight, erect branches. 

  • Finely striped, often with dark fibers. 

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