Answer: semimonthly

AnswerCrossword Clue
SEMIMONTHLYOn the first and the 15th
SEMIMONTHLYLike some periodicals
SEMIMONTHLYAbout 24 times a year
semimonthlyOccurring or published twice a month
semimonthlyhalf-monthly / a periodical appearing twice a month