Saw the postings on connecting and communicating with your freshman children.
My son found excuses not talking to us when he was a freshman. It is the time that they try to seek independence. So just relax. If they don't want to talk to you, let them go.
Children often tell you that they are busy with study, etc because they know that their parents would like to hear that. In reality, classes are not difficult.
He told me that many ABC children complained that their parents are controlling freaks. They don't feel like going home at Thanksgiving nor Christmas. We are talking "good" IVY league students.
Eventually children would figure things out, and things are settled.
My son skypes me once a week now and we text/call in between if needed. So when I call him, he would immediately pick up because he knows that I would not call unless there is something urgent or important.
So relax, and enjoy yourself with work or new hobbies.