What was the reign of Frankish rulers from 751 to 987?

We're doing a crossword puzzle in my World History cl, and the teacher is an evil sadist who likes to ign crosswords that have at least one answer that is not in our books or notes. Does anyone know what the reign of the Frankish rulers is? It is NOT Carolingians, because it doesn't fit. It has 11 letters. Thanks in advance!