This is the 8450th most frequent Polish word.
polce
"Polce" is not a standard Polish word. It may be a typo or misspelling.
Used to indicate the location where the book should be placed, showing 'polce' as 'shelf' in the dative case.
Więc odłóż książkę na polce.
So put the book on the shelf.
Describes an object's position, using 'polce' as 'shelf' to emphasize its spatial context.
Na polce stała piękna wazka.
On the shelf stood a beautiful dragonfly.
Mentioning the location where the object (the letter) was discovered, using 'polce' in context of locating items on a shelf.