decussate vs intercross

decussate

verb
  • To form an X or to cross or intersect. 

adj
  • Having opposite leaves arranged alternately at right angles. 

  • Consisting of two rising and two falling clauses, placed in alternate opposition to each other. 

  • Crossed; intersected; resembling a letter X. 

  • Having anatomical structures or markings crossing each other, typically in an X shape or at right angles. 

intercross

verb
  • To cross back over one another 

  • To breed two strains having a common ancestry with one another 

noun
  • The act or product of intercrossing 

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