acculturate vs acculture

acculturate

verb
  • To change the culture of (a person) by the influence of another culture, especially a more dominant culture. 

  • To cause (a person) to acquire the culture of society, starting at birth. 

  • To be changed by acculturation. 

acculture

verb
  • To familiarize oneself with, and adopt a new culture, especially by an immigrant 

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