Give me a brief synopsis of Larry David’s contribution to Seinfeld based on the text.

Larry David was a co-writer for seven seasons on the hit TV show Seinfeld. In addition to writing 62 episodes, he played several characters on the show, including Frank Costanza’s lawyer and the voice of George Steinbrenner. The character of George Costanza was also based on Larry David. His work on the show earned him 19 Emmy award nominations and two wins, numerous accolades, and considerable syndication income.