Extremely
Not often
Extremely and not often are semantically related in infrequently topic. Sometimes you can use "Extremely" instead an adverb phrase "Not often".
Mutual synonyms
Both terms in one sentence
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Quite common Whateley Universe (though not often worded as such), due to the prevalence of the Most Common Superpower, especially by Phase, who, being an exception to the Third Law of Gender Bending, is extremely displeased with the male attention she gets.
Source: My Eyes Are Up Here -
Even though he's toned it down quite a bit from his heel persona, he still comes off as extremely cocky and smug, and he seems to be something of a loner in Kayfabe, not often seen coming to other faces' rescue.
Source: Wrestling / The Miz -
Gorn: Not often, but there are a couple of extremely visceral scenes, mostly involving Johnnie Walker.
Source: Literature / Kafka on the Shore
Cite this Source
Not often and Extremely. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/extremely/not_often
Extremely & Not often. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/extremely/not_often>.
Not often or Extremely. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/extremely/not_often.
Google Ngram Viewer shows how "extremely" and "not often" have occurred on timeline