Crossword puzzle clue "three line work"

Opus ___ (Catholic teaching also called "the Work, work work work work")

"If three hens lay three eggs in three days ...," e.g.

Three short, three long, three short

Three times, a classic Three Stooges line

Three-line work

Add vertical line 13 (word 3) and vertical line 3 (word 1) together and enter the answer to the resulting clue on this line

Add vertical line 9 (word 2) and vertical line 7 (word 2) and enter the answer to the resulting clue on this line

Add vertical line 1 (word 1) and vertical line 15 (word 3) and enter the answer to the resulting clue on this line