時ときたま

adverb

occasionally; once in a while; at long intervals

Describes something that happens infrequently, with noticeable gaps between occurrences. Similar to たまに but can imply longer intervals.

• 時ときたま、昔むかしの友とも達だちから手て紙がみが来くる。

  Occasionally, I get a letter from an old friend.

• 彼かれは時ときたましか顔かおを見みせない。

  He only shows up once in a while.