excursion into something
From Longman Dictionary of Contemporary Englishexcursion into somethingexcursion into somethingformalTRY TO DO OR GET something an attempt to experience or learn about something that is new to you the company’s excursion into new markets → excursionExamples from the Corpusexcursion into something• During the meeting, the two leaders made brief excursions into the issue of Asian security.