Complex sentence: The Federalists argued that annual elections would not afford representatives a proper amount of time in which to learn about their office, and therefore they proposed biennial elections as a solution that would allow representatives to gain experience without remaining in office for too long.
Split into simpler sentences: The Federalists argued that annual elections would not afford representatives enough time to learn about their office. They proposed biennial elections to allow representatives to gain experience without remaining in office for too long.