Fixed Phrases with Prepositions: By Chance, On Time, In Time, At the End, In the End

Fixed prepositional phrases must be learned as chunks.

• by chance — accidentally: We met by chance.
• on time — punctual, as scheduled: The train arrived on time.
• in time — early enough, not too late: We got there in time to see the start.
• at the end + of: at the end of the film — at the final part of something
• in the end — finally, after everything: In the end, we stayed at home.

Also common: by accident, on purpose, in fact, at least, in a hurry, on the other hand.