How often does Mercury retrograde occur?

Mercury retrograde is an astrological phenomenon that occurs about three to four times a year, for approximately three weeks each time. During this period, the planet Mercury appears to be moving in a backward motion in the sky, although it is not actually doing so. This apparent backward motion is called retrograde.

Mercury retrograde is considered a time of potential miscommunications, delays, and other challenges, according to astrologers. People are advised to be cautious during this time and to double-check important documents and communications to avoid misunderstandings.