Two:
"I know you prefer double chocolate Ron, but George made off with all of them. No really! Every last one." An almost-real tilt of the lips this time as Harry remembered George's shenanigans. Mrs. Weasley had walked into the kitchen, and the sight of her two remaining children quietly cooking for themselves had set 'that' look on her face. George immediately broke out the comedy act as best he could, and tears were narrowly avoided.
"Well, I don't have a lot of time to visit today. Working on something, yeah? I'll be back tomorrow." He half-waved and turned, walking back up the hill to the graveyard's exit. Politely leaving the grounds before apparating away.