As a lifelong inhabitant of the trammed city of Melbourne, it pains me to have to agree that
trammed is not really a common word. Neither is
tramming, which is also classed that way at present. I'll change them.
The Wikipedia page
List of tram and light rail transit systems reveals that there are a multitude of cities running trams, but most of them are not in English-speaking countries.
MK, with regard to your speculation whether this word contributed to a dearth of rosettes in the puzzle concerned (10 letters, 26 March), the new "List by plays" button gives us a chance to explore this.
It shows that there were 10 other common words in that puzzle that were more elusive than
trammed (which is the next word above those shown in the image). 94 players played it. However, there were probably quite a few people who tried it without any strong expectation it would be accepted. The experienced Chi-ite will know that it's usually worth trying
-ED on the end of almost any word.