Can be confusedperiodic periodical
Examples from the Web for periodical
What the Tea Party needed was its own periodical, he concluded.
It must be, with such genius, tact and experience, all that a weekly periodical can be.
His Bill provided for the periodical visitation of private mad-houses by magistrates.Chapters in the History of the Insane in the British Isles|Daniel Hack Tuke
Probably of no periodical in the country has the press everywhere spoken with unqualified approval.
Never did a periodical receive such an amount of gratuitous advertising.The Americanization of Edward Bok|Edward William Bok
The infantry of the line have their periodical rests, a month it may be, of comparative leisure before the enemy trenches.Sketches of the East Africa Campaign|Robert Valentine Dolbey