ethnic minority vs ethnicity

ethnic minority

noun
  • A group of people who have a different ethnicity, religion, language or culture from that of the majority of people in the place where they live. 

ethnicity

noun
  • An ethnic group. 

  • The common characteristics of a group of people, especially regarding ancestry, culture, language or national experiences. 

  • Race; common ancestry. 

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