seven vs seventeen

seven

num

  • A numerical value equal to 7; the number following six and preceding eight. This many dots: (•••••••). Describing a group or set with seven elements. 

noun

  • The digit/figure 7 or an occurrence thereof. 

  • A card bearing seven pips. 

seventeen

num

  • The cardinal number occurring after sixteen and before eighteen, represented in Roman numerals as XVII and in Arabic numerals as 17. 

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