cove vs longsword

cove

noun
  • A concave vault or archway, especially the arch of a ceiling. 

  • A thin line, sometimes gilded, along a yacht's strake below deck level. 

  • A recess or sheltered area on the slopes of a mountain. 

  • A hollow in a rock; a cave or cavern. 

  • The wooden roof of the stern gallery of an old sailing warship. 

  • A strip of prairie extending into woodland. 

  • A small coastal inlet, especially one having high cliffs protecting vessels from prevailing winds. 

  • A friend; a mate. 

verb
  • To arch over; to build in a hollow concave form; to make in the form of a cove. 

  • To brood, cover, or sit over, as birds their eggs. 

longsword

noun
  • A European sword with a long, straight double-edged blade, a cruciform hilt, and a grip for two-handed use; prevalent from the 14th to 16th centuries. 

  • Any type of sword that is comparatively long; depending on context, applied to swords of the Bronze Age, Migration period, Viking Age and Renaissance era. 

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