noun which may take the genitive case particle 'no', noun
Describes something that is ordinary, habitual, or typical for a person or situation. Often used as a no-adjective.
普段の生活ではあまり運動しない。
I don't exercise much in my everyday life.
これは
These are my everyday clothes.
noun, adverb
Adverbial use indicating habitual or typical action. Can be used as a noun or adverb.
普段は電車で通勤しています。
I usually commute by train.
彼は普段と違って今日は静かだ。
He is quiet today, unlike usual.