artery vs main route

artery

noun
  • Any of the muscular- and elastic-walled blood vessels forming part of the circulation system by which blood is conveyed away from the heart regardless of its oxygenation status; see pulmonary artery. 

  • Hyponyms: alloartery, arteriole, endartery, microartery; see also Thesaurus:artery 

  • A major transit corridor in a system of roads, rivers, or railway lines. 

main route

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