banister vs picket fence

banister

noun
  • One of the vertical supports of a handrail; a baluster. 

  • The handrail on the side of a staircase. 

verb
  • To construct a banister 

  • To act as a banister 

picket fence

noun
  • A simple fence made from wooden pickets, connected by horizontal bars. 

  • A series of spaced perpendicular striations that occasionally occur in aurorae. 

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