時ときには

と

き

に

は

Common wordJLPTN1Freq.FrequencyTop 10,000

Meanings

1

Used to indicate that something happens from time to time, not always. Often appears at the beginning of a sentence or clause.

は

、

一人ひとり

で

旅りょ

行こう

する

の

も

楽たの

しい

。

Sometimes it's fun to travel alone.

彼かれは時ときには遅ち刻こくすることもある。

He is occasionally late.

時とき々どきN5
時々 is the common, neutral word for 'sometimes', while 時には carries a nuance of 'there are times when' something happens, often introducing a contrastive or exceptional case.
たまにN4
たまに is more casual and implies a lower, more occasional frequency than 時には, which can be used in both formal and informal contexts.
時とき折おりN2
時折 is a slightly literary, formal-sounding word for 'occasionally', whereas 時には is more commonly used in everyday speech and writing alike.
時ときとして
時には is the everyday equivalent of 時として, which sounds more formal and is common in writing or news.

Combination of 時 (とき, 'time') with the particle に and the topic marker は, literally 'at times'.