1.We waited for the better part of an hour, then called again.

eg. I spent the better part of an hour to expalin how come I gave the fruit, which were prepared for the meeting, to my colleagues without asking in advance for my boss.

2.Penguins spend a good part of their lives in the water as well as on land. As they have been known to achieve speeds of up to 90 kph in the water, does that make them the fastest amphibian (am' fibiam)?

eg. My mom spend a good part of her lives worshiping Buddha.