way off vs wrong number

way off

adj
  • remote; far; distant (in space) 

  • remote; far in the future 

  • very wrong, not even close 

wrong number

noun
  • A telephone number dialled by mistake, for example by transposing digits. 

  • A telephone call received from an unfamiliar caller, due to a mistake in the number dialled. 

How often have the words way off and wrong number occurred in a corpus of books? (source: Google Ngram Viewer )