Some customers expect/request a lower rate that includes considering the number of times words are repeated. I am interested in hearing who takes repetitions into account and how it is done.
It is generally acceptable to apply repetition discounts if the sentences repeat, but not if only the individual words repeat. Those not willing to grant discounts for repeating sentences may sometimes be willing to give discounts for repeating paragraphs. It is up to you how you do it, but sentence-level is most common.