Answer:

oftener

Answer	Crossword Clue
OFTENER	On more occasions
OFTENER	More frequently
OFTENER	Comparatively frequent

OFTENER	More
OFTENER	At shorter intervals
OFTENER	Not so seldom
OFTENER	More frequently.
OFTENER	Not so seldom.
OFTENER	"We must do this ...."
OFTENER	With greater frequency
OFTENER	Not so rarely

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.