Can tarot cards only be used once a month?

There is such a sentence, but it also depends on what kind of question you answer. It is not easy to repeat the test about love or the same question within one month. There is also a problem that the soothsayer himself cannot measure, which will reduce the accuracy of the whole deck of cards.

Regarding the second question, it is best to use only one deck of tarot cards, because each deck of tarot cards has its own "personality" and several decks of tarot cards cannot be used at the same time.