Here are examples of the word/phrase "uncommonly" used in a sentence and paraphrased in a sentence...
Pink is an uncommonly worn color amongst males.
Pink is an unconventionally worn color amongst males.
It is hard to learn ancient languages because they are uncommonly used in modern times.
It is difficult to learn ancient languages because they are unconventionally utilized in modern times.
This modern day document was uncommonly written on a stone tablet.
This modern day document was unconventionally written on a stone tablet.
Other Examples...