using Guidance and Resistance for long term effects

The Guidance and Resistance cantrips both last for 1 minite, but a lot of saves and checks represent longer stretches of time, and I want to know if those cantrips can be applied in those situations.

For instance, can a creature on watch benefit from Guidance for their Wisdom (Perception) roll?

Can a creature traveling for extra hours in the day benefit from Resistance for their Constitution save to prevent exhaustion?