Neulich is used to point at a single point in time in the past like the other day.

In letzter Zeit refers to a time span like in the last weeks or lately.

Neulich is used to point at a single point in time in the past like the other day.

In letzter Zeit refers to a time span like in the last weeks or lately.

1. I've talked to my mother the other day.
2. I haven't talked to my mother much lately. (not exactly your example)