high jump vs pole vault

high jump

noun
  • An athletics event where a competitor must jump over a bar placed gradually higher and higher. 

pole vault

noun
  • a jumping event contested in track and field which requires an athlete to carry a fiberglass pole down a runway, plant the pole into a vaulting box and vault over a fiberglass bar, landing on a matted pit 

How often have the words high jump and pole vault occurred in a corpus of books? (source: Google Ngram Viewer )