frame structure

15 LETTERS · STARTS WITH F

frame structure is a valid 15-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

F4R1A1M3E1S1T1R1U1C3T1U1R1E1

4 + 1 + 1 + 3 + 1 + 0 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does frame structure mean?