erasement vs translocation

erasement

noun
  • erasure; obliteration 

translocation

noun
  • Removal of things from one place to another; displacement; substitution of one thing for another. 

  • A transfer of a chromosomal segment to a new position, especially on a nonhomologous chromosome; the segment so transferred. 

  • A transfer of a molecule through a membrane. 

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