Stamford Bridge on Sunday after appearing as a 24th minute replacement for the injured Ramires.
The England midfielder has found his starting opportunities limited in recent weeks as Benitez has attempted to manage his squad through a crowded fixture schedule and, with his contract due to expire at the end of the season, time is running out for Lampard to match or surpass Bobby Tambling's mark.
Should Chelsea eliminate Basle in this week's Europa League semi-final second leg, they will have five more fixtures this season, but Chelsea manager Benitez won't guarantee he will feature in all of them.
"Frank is a great player," said Benitez. "I'm really pleased he's scored another goal, and hopefully he will score five between now and the end of the season and he'll be much happier.
"He's a good player with quality. If you're controlling with possession, he can have an influence.
"I was talking before the game saying he had to be ready but he's a great professional. Always focused.
"He understands the priority is to qualify for the Champions League. He wants to play but he understands the team is first."
Lampard's introduction lifted Chelsea's performance and the midfielder set up Oscar for the 43rd minute opening goal before converting from the spot in first half stoppage-time.
The win moved Benitez's side into third place, three points clear of Tottenham who lie fifth but the manager believes the battle for a top four finish will continue until the last day of the season.
Benitez, who expects Ramires to be fit to face Basel, said: "I said that, maybe, it will go to the last game. If nothing happens different or special, it could be until the last game against Everton.
"We have to do our job, manage the squad, playing this attacking football we played in the second half with combinations, we'll be okay."
Meanwhile, Chelsea captain John Terry started a second successive game in the wake of his admission he is ready to reverse his decision to retire from international football.
Benitez, who will leave Stamford Bridge at the end of the season, insisted he hadn't spoken to Terry about the England situation.
He said: "That is not my business. My business is to keep him as fit as possible for every game. Afterwards, another manager will take responsibility for this in the summer.
"I say 'another manager', but that is the international manager or whatever. I only speak to him about Chelsea and I want him to be fit and ready.
"He was injured for 16 weeks so he had to come back. He was training normally with the team and if he's training I can pick him for any game: two, three, one, it depends on the game and the position."
Swansea are now without a win in six games and face Manchester City at home next weekend.
Manager Michael Laudrup admits he would like to end the season on a high but claims his side have already over-achieved this year following their League Cup final triumph.
"It's always good to try and end well, it helps with confidence," said Laudrup. "What is incredible is in the last month and a half, without a win, we were ninth. And we're still ninth.
"So I like to think we have done better than expected. To be on 40 points so early, no one would have expected that. But we've not had a very poor game since winning the League Cup."