dissimilarity vs rapport

dissimilarity

noun
  • Lack of similarity or lack of likeness in appearance to something else. 

rapport

noun
  • A relationship of mutual trust and respect. A close and harmonious relationship in which the people or groups concerned understand each other's feelings or ideas and communicate well. 

  • Relation; proportion; conformity. 

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