The veteran midfielder understands that he is not going to get in the team every week but says that he is close to full fitness after missing out on pre-season this summer
The 38-year-old has featured in every Premier League season for the Red Devils, but nowadays the Welshman is no longer the first name on the team sheet.
While wanting to play as much as he can, Giggs understands Sir Alex's decision to use him sparingly.
"It’s not a new thing for me, not getting in the team every week," he told The Times of India.
"It’s been happening a bit over a few years. I have got used to it. I don’t worry too much because I know that come the business end of the season I’ll be ready, I’ll be fit and the manager will use me."
Giggs hasn't played many games in the early part of the season because of his involvement in the Olympics, which meant he missed United's pre-season preparations.
"I’m in good shape," he continued.
"I was at the Olympics so I missed the majority of the club’s pre-season training and that meant I was perhaps a little bit [more] rusty than others. But I’ve managed to get back in shape over the last few weeks, working with the coaches."
United host Arsenal at Old Trafford on Saturday, a fixture to which Giggs is no stranger. The Welshman believes it's vital that the hosts get something out of the game.
He added: "It’s obviously a big game with a lot of history to it. City and Liverpool have always been big games for United. But since I’ve been in the team it was Arsenal and then Chelsea who turned out to be the main challengers. Getting points out of those games is very important."