bell tower vs flèche

bell tower

noun
  • A tower in which a bell (or set of bells) is hung; a belfry. 

flèche

noun
  • A spire or steeple, especially of Gothic style; an object emerging from the ridge of a roof. 

  • Any of the twenty-four points on a backgammon board. 

  • An earthwork consisting of two berms forming an angle with an open gorge. 

  • A method of attack with a sword (foil or épée) in which the attacker's back leg crosses in front of the front leg in the offensive move. 

verb
  • To attack using the flèche method. 

How often have the words bell tower and flèche occurred in a corpus of books? (source: Google Ngram Viewer )