The Olympic champion headed into the World Cup finale knowing that only German team-mate Johannes Rydzek could spoil his party.
Frenzel wraps up fifth straight Nordic Combined title
But while Rydzek could only finish ninth in 29.17.3 minutes, Frenzel wrapped up a tenth win of the season as he won in 28:49.7.
Germany complete Nordic Combined dominance with team win
That meant that Frenzel finished the campaign on 1734 points, with Rydzek second with 1609 and Akito Watabe of Japan third with 1086 after he finished third in Schonach.
Completing the podium in Schonach was Francous Braud of France who was 7.7 seconds behind Frenzel.