ford vs wade across

ford

verb
  • To cross a stream using a ford. 

noun
  • A location where a stream is shallow and the bottom has good footing, making it possible to cross from one side to the other with no bridge, by walking, riding, or driving through the water; a crossing. 

  • A stream; a current. 

wade across

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