In
In adjective - Being in the latest or current fashion.
Of and in are semantically related in to topic. In some cases you can use "Of" instead a preposition "In", when it comes to topics like per.
Of
Cite this Source
Of and In. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/in/of
In & Of. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/in/of>.
Of or In. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/in/of.
Google Ngram Viewer shows how "in" and "of" have occurred on timeline