Since Darko Milanic took charge of the club last month, Sharp has been limited to just two appearances from the bench.
However, with the international break coming to an end, the 28-year-old has expressed his determination to force his way into his manager's plans.
"I am frustrated and the manager knows that and I have got to keep doing what I do and get back in the team and keep [my place]," he told the Yorkshire Evening Post.
"When you are not playing, the international breaks are a bit of a welcome break and you can get the frustration out of your head and come back fresh and go again and get back in the team.
"Obviously when you are playing, you want to just keep going to keep the rhythm going, but I am happy for this break just to clear my head."
Sharp has not scored since the second Championship match of the season.