different between peddling vs canvassing

English

peddling

peddling (plural peddlings)

The act of one who peddles.
- 1982, Chinese Literature
  Boats shuttled to and fro, and the hawkings and peddlings of all sorts of wares helped to create an amazing scene of activity and prosperity.

peddling (not comparable)

canvassing

canvassing (plural canvassings)

The act of one who canvasses or solicits.
- 1853, Documents of the City of Boston
  The thoroughness required by your explicit instructions, together with the strong desire that these repeated canvassings should be executed in so careful a manner as to establish reliable data, has no doubt tended materially to produce the gratifying result.

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