The Norwegian has guided United to 10 wins in 11 games since Jose Mourinho was sacked in December.
Solskjaer has engineered a remarkable turnaround at Old Trafford and is now among the favourites to land the job on a full-time basis.
His appointment has sparked a turnaround in a number of players’ performances, including Paul Pogba and Marcus Rashford.
But £52m summer signing Fred and his Brazilian team-mate Pereira have struggled for regular playing time.
“I don’t think he needs to worry too much. He’ll get chances.”
Man Utd boss Ole Gunnar Solskjaer
There have been suggestions they could be sold this summer as they seek first-team football.
However, Solskjaer has backed them to prove themselves when given a chance.
“Fred is exactly like everyone else,” he said.
“You know he’s going to be able to contribute and he will contribute, don’t worry about that.
“He’s a good lad, same with Andreas, he’s working really hard, you’ve got Scott [McTominay].
“And when they get the chance, because they will, we want to see improvement.
“We know there’s a very, very good player there with Fred so hopefully he’ll adjust to the English game because there’s no doubt there’s talent, absolutely no doubt.
“It’s always difficult to come here. One, it’s Manchester United, you’re expected to perform straight away.
“Two, it’s an English league that he’s not used to.
“But he’s a Brazilian international, Andreas is a Brazilian international, the talent is there and when they get the chance the next time it’s easier to come into a team that’s doing well.
“There’s loads of players that have come in and found the first few months difficult.
“One of the best players I’ve played with that struggled the most was Diego Forlan.
“(Juan Sebastian) Veron you know, those two fantastic players and it took a bit of time. But when they settled they performed.
“So I don’t think he needs to worry too much. He’ll get chances.”