Freya held her hands up in mock surrender, "Deal." Because they both knew that the other would worry regardless and to just accept it. Even if the purpose of trying to say there was no need to worry was to lessen said concern and to attempt to reassure. In the end, it was always going to just be words because it wasn't like worry and concern were something which could be turned off with some sort of switch.
"So long as you know that because I really don't mind and wouldn't want you to think you can't just because you're aware of my schedule." That was really all she could offer on that front. In some ways, Freya felt like she would always be trying to make up for being gone for so long even though she had always made sure to make herself available and to fly back in case of an emergency even if it was for a short trip.