Alternative forms 
Reduplication (with rendaku) of 時 (toki), time.
時々 (hiragana ときどき, romaji tokidoki)
- sometimes, at times
Watashi wa tokidoki tenisu o shimasu.
- I sometimes play tennis.
時々 (traditional, Pinyin shíshí, simplified 时时)
- often, constantly
Usage notes 
In the Mandarin language, the symbol 々 is sometimes used in casual horizontal writing (or calligraphy) to indicate a repeated character, but not in formal writing, in print, or on the Internet. More often, 〻 is used (but still only casually), or sometimes the older 二. Usually, however, the character is simply written twice, without the use of any of the above symbols. In Japanese, 々 is used in any kind of writing.