Pinterest When do Pinterest posts normally begin to get views and engagement?

[Cellarac]

One thing I find interesting about Pinterest is that timing is not always the same. Some pins start getting views in just a few days, but others can stay quiet for a long time before they suddenly grow.

For people who use Pinterest a lot, how long does it usually take to know if a pin will do well? If a pin does not get attention early, do you change it or just leave it and wait to see what happens?