All films created by Walt Disney at the time of his major outpouring of work were carefully crafted to fit scenes, characters, moods and situations. If these elements changed in any way, songs - no matter how good they were - were discarded. Others were written for the new scenes. Many times, character songs were dropped because characters were dropped...sequences were dropped etc.
Richard ShermanMy brother & I have always said that to write a song, it takes all the experiences of your life, plus the time it takes to write it! To be specific, yes, sometimes a song takes place in one session - together in one day.
Richard ShermanIf you put in the work, put in the time, put in the effort, you're going to reap the benefits.
Richard Sherman