alikeness vs heterogeneity

alikeness

noun
  • The state or quality of being alike. 

  • The result or product of being alike. 

heterogeneity

noun
  • Diversity 

  • A composition of diverse parts. 

  • The quality of a substance which is not uniform. 

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