Chris Eagles settled the contest shortly before the hour, coolly converting after Marvin Sordell pounced on an error by Town captain Peter Clarke - one of several visiting players to come close to scoring during the second half.
Recalled winger Sean Scannell was at the heart of much of Huddersfield's impressive play, but he and his team-mates found goalkeeper Andy Lonergan and the Bolton defence in stoic form.
"It was a major victory because I felt you saw a group of players put their bodies on the line, committed and organised at the end of the match," Freedman said.
"As a player for 20-odd years and now as a coach I understand it's the best quality to have at this time of the season - the qualities that you saw in the last 10 or 15 minutes.
"Huddersfield have got to win the game, they're in a relegation battle and they're throwing everything at us. To see what I've seen as a coach - the organisation, the discipline and the commitment is a fantastic quality to have with half a dozen games to go."
Wanderers' fourth consecutive 1-0 win at the Reebok Stadium takes them to within four points of sixth-placed Brighton for that final stretch, while Huddersfield remain in the relegation zone on goal difference having played a game more than fourth-bottom Sheffield Wednesday, but boss Mark Robins was happy to take the numerous positives on show in his side's performance.
"I thought we played well," he said. "I was proud of the players, I thought they gave me everything.
"In all fairness tonight's game was not going to be a season-defining game - it was a marker for the remaining games of the season. We've given a good account of ourselves, I thought we controlled it for the most part.
"We created a lot of chances but just couldn't get the killer touch."