hark back vs transpose

hark back

verb
  • To return to where one has previously been; to retrace one's steps. 

  • To allude, return, or revert (to a subject previously mentioned, etc.); also, to evoke, or long or pine for (a past era or event). 

  • To call back (hounds); to recall. 

  • Of hounds: to retrace a course in order to pick up the lost scent of prey. 

noun
  • An act of hounds retracing a course in order to pick up the lost scent of prey. 

  • An act of alluding, returning, or reverting (to a subject previously mentioned, etc.); also, an act of evoking, or longing or pining for (a past era or event). 

transpose

verb
  • To move (a term) from one side of an algebraic equation to the other, reversing the sign of the term. 

  • To rewrite or perform (a piece) in another key. 

  • To rearrange elements in a matrix, by interchanging their respective row and column positional indicators. 

  • To give force to a directive by passing appropriate implementation measures. 

  • To reach a position that may also be obtained from a different move order. 

  • To reverse or change the order of (two or more things); to swap or interchange. 

adj
  • A matrix with the characteristic of having been transposed from a given matrix. 

noun
  • The process of rearranging elements in a matrix, by interchanging their respective row and column positional indicators. 

  • The resulting matrix, derived from performing a transpose operation on a given matrix. 

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