"To avoid confusion vs us

"To avoid confusion

us

det
  • The speakers/writers, or the speaker/writer and at least one other person. 

pron
  • Me. 

  • Our. 

  • Me and at least one other person; the objective case of we. 

  • Me (in all contexts). 

How often have the words "To avoid confusion and us occurred in a corpus of books? (source: Google Ngram Viewer )