They will find time to spend with you, even if it’s 5 minutes out of the day. “Busy” or not.
It’s just not true.
If the trust is reciprocal, than you don’t need to talk every day. Sometimes people are busy. lives happen. Jobs happen. People happen. It’s harmful to friendships and relationships alike to uphold this sort of paradigm; if they care about you they will still care about you no matter how busy they are. And if you trust them you’ll know that they still care even if they can’t squeeze out some time for you.