7-Letter Words Matching _T_D___

There are 12 7-letter words that match _T_D___. 6 are common words, such as STADIUM and STUDDED. A rarer one is STUDDIE. In this set, S is the most frequent open letter (12 words). 3 words contain a doubled letter.

Full list 12

stadiumstuddedstudentstudiedstudiesstudiosstodgesstudierstaddlestadiasstodgedstuddie

About this list

Words
12 (6 common words)
Common example
stadium
Rare example
studdie
Doubled letters
3
Ending in S
4
Most frequent letter
S (12)

Questions

How many 7-letter words matching _t_d___ are there?

12. 6 of them are common words.

What is a common example?

STADIUM is among the common words in this set.