Reference

6,000 30 November 1952 v BC Augsburg (league) Average home league attendance: 17,733: The 1953-54 Eintracht Frankfurt season was the 54th season in the club's football history. In 1953-54 the club played in the Oberliga Süd, the top tier of German football. It was the club's 9th season in the Oberliga Süd.

Eintracht Frankfurt Bundesliga 50.025 08. 1. FC Köln Bundesliga 49.643 ... Attendance by league: Bundesliga: 42.540 Bundesliga 2: 21.433 3.Liga: 7.822 ... You would have to check down to the 8th tier at least as one club at that level has an average home attendance of 3483

The last home game of the season against Mainz saw Eintracht Frankfurt set a new attendance record for the club! ... While the stadium capacity was limited to 48,000 for UEFA Europa League matches, they had an average gate of 49,700 for home matches this season in the Bundesliga, setting a new club record.