let it go vs overpass

let it go

overpass

verb
  • To pass above something, as when flying or moving on a higher road. 

  • To exceed, overstep, or transcend a limit, threshold, or goal. 

  • To disregard, skip, or miss something. 

noun
  • A section of a road or path that crosses over an obstacle, especially another road, railway, etc. 

How often have the words let it go and overpass occurred in a corpus of books? (source: Google Ngram Viewer )