Frohnmayer was born in Crawley, West Sussex, England,[1] but raised in Tegernsee, Upper Bavaria, Germany.
[2][4] In the 2012 tournament, contested by 6 nations in Utrecht, Netherlands,[7] she led Germany into the final, against Jersey, but the team lost the match by 8 wickets.
[13] In May 2017, the Frohnmayer-led team won another bilateral series, against Italy in Bologna, 2–1, with Frohnmayer scoring 30* and partnering with Anuradha Doddaballapur (who made 30) to take Germany to victory with 6 balls to spare in the deciding final match.
[17][18] In February 2020, Frohnmayer starred in the fourth WT20I match of a bilateral series between Germany and Oman at the Al Amerat Cricket Stadium, Muscat.
[20] During the death overs of the third match, her 13* off 16 balls assisted her team to a series-topping total of 132/4, and ultimately to victory by 65 runs.
[21] The following month, Frohnmeyer played in all four of Germany's matches in the 2021 ICC Women's T20 World Cup Europe Qualifier.