The 38-year-old has featured in every Premier League season for the Red Devils but, while wanting to play as much as he can, he understands the Scot'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."
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"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 that it is vital that the hosts get something out of the game.
"It's obviously a big game with a lot of history to it," the Welshman noted.
"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."