One person messages several times a day, and the other sends one message in the evening. The difference usually comes not from how much they care but from what each of them uses contact for.
They use contact for different purposes. For one person, a message confirms that they are together right now. For the other, a message is something to send when there is something to say. When there is nothing to say, the second person does not send anything.
How they work also matters. Someone who focuses on one task for a long time finds it hard to get back to it after stopping to reply. A late reply often means not less interest but that they could not stop in the middle of what they were doing.
Fewer messages look like a sign that they are not a priority for the other person. Once they conclude that they come after work, they look at when a reply arrived before reading what it says.
While waiting, they come up with all kinds of explanations. With no way to check, they reach a conclusion alone and start the next conversation believing it. When they talk in person, it usually turns out to be wrong.
They use time alone differently. People who recover by being alone cannot rest when messages keep coming, and people who recover by being with others do not feel rested without contact, even after a break.
They also judge the relationship by different evidence. Some people confirm it by talking often, and others by keeping promises. The second group may message rarely, but they always show up on the day they agreed to meet.
Agreeing on times works better than agreeing on a number. A promise to message a certain number of times a day is hard to keep, but a promise to message at lunch and before bed is easy to keep, and the person waiting knows when to expect contact.
Sending one sentence in advance when a reply will be late solves most of the problem. Saying they are in a meeting and will reply in the evening is enough. The problem is not the delay itself but not knowing when a reply will come.
Contact becomes a way of checking feelings. Once they start judging the other person's feelings by how quickly they reply, neither of them pays attention to what the messages actually say.
The person who messages less puts it off even more because replying feels like pressure. The person who messages more sees this and sends even more. As each does the opposite of the other, the difference grows.
How often someone wants contact cannot be predicted from personality type names alone. Even with the same type, the right amount can differ a lot depending on how much time alone each person needs.
The relationship analysis shows where the two people differ and which arguments are likely to repeat, as specific situations. If contact is something they are likely to clash over, that situation appears, and they can use it to agree on an amount of contact both can keep.
This page describes behavior patterns for self-understanding. It is not a medical or psychological diagnosis, and it does not replace professional care. If difficulties persist and disrupt daily life, please seek professional help.
This page covers the type in general. How it actually shows up in your own combination is what the measurement tells you.