When referring to a specific occurrence or case, the phrase "in instance" can be substituted with a variety of synonyms. Some alternatives include "in case," "in occurrence," "in situation," or "in event." These phrases all convey the same meaning of referring to a specific instance of something. Another possible synonym for "in instance" is "in example," which places emphasis on using the occurrence as a point of reference or illustration. Other options include "in occurrence," which highlights the fact that the situation being discussed has happened before, or "in occurrence of," which emphasizes the cause or reason for the situation being described.