acclimatization vs accustoming

acclimatization

noun
  • The act of acclimatizing; the process of inuring to a new climate, or the state of being so inured. 

  • The climatic adaptation of an organism that has been moved to a new environment. 

accustoming

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