How long does it take to collect all the parts for the Elda God?

With the current event, you can create the Elda God, but I'm planning to collect the fragments after I finish gathering the chips. However, I still haven't finished collecting the chips... (down to the last 3) I'd like to ask those who have completed it: how long did it take you to complete the watch? Also, based on your experience, do you feel that chips or fragments have a higher drop rate?