from pillar to post vs wherever

from pillar to post

adv
  • From one place (or person, or task) to another; from post to pillar, hither and thither. 

wherever

adv
  • In, at or to any place that one likes or chooses. 

  • Where ever; an emphatic form of where. 

  • The place (no matter where) in, at or to which. 

conj
  • In, at or to any place (that); anywhere. 

  • Used to show that one does not know where someone or something is located. 

  • In, at or to all places or situations (that); everywhere. 

  • Regardless of the place in, at or to which. 

How often have the words from pillar to post and wherever occurred in a corpus of books? (source: Google Ngram Viewer )