1. Now and then or here and there
   - occasionally, on occasion, now and then, now and again, at times, from time to time

Encyclopedia: Once in a while

• look
• look across
• look after
• look around
• look at
• look away
• look back
• look backward
• look down on
• look for
• look forward
• look into
• look like
• look on
• look out on
• look out over
• look sharp
• look smart
• look to
• look up to
• look upon
• look-alike
• look-in
• look-over
• look-see