a good deal

From deal (“division, portion, share”). Compare a great deal, etc.

• "We had a good deal more money after winning the lottery."
• "He said he was sometimes whistling a tune to himself — for, like me, he sawed a good deal on the fiddle; […]"
• "She was a good deal frightened by this very sudden change, but she felt that there was no time to be lost, as she was shrinking rapidly: so she set to work at once to eat some of the other bit."

• a great deal

• good deal