The availability of GMAT exams varies throughout the year, with certain months being more or less popular for test takers. Here is a breakdown of the specific months when GMAT exams are more or less available:

More Available Months:
- January: January is generally a popular month for GMAT exams as many students plan to apply to business schools in the following fall. Test takers often aim to complete their exams in January to have sufficient time to prepare applications.
- February: Similar to January, February is also a month when GMAT exams are readily available. It allows students to finish the test before application deadlines.
- March: March is another month with high availability of GMAT exams. Test takers who were unable to schedule their exams in January or February often choose March as an alternative.
- April: April is generally a busy month for GMAT exams as students who missed the earlier months' exams or want to retake the test for a better score often choose this month.
- June: June is a popular month for GMAT exams, particularly for students planning to apply to business schools in the following year. It provides ample time for preparation and allows test takers to focus on other aspects of the application process.

Less Available Months:
- May: May is a month when GMAT exams may be relatively less available compared to other months. This is because many test takers prefer to complete their exams in April or June, leaving fewer slots in May.
- July: July is another month when GMAT exams may be less available. Many students take advantage of the summer break to prepare for the exam, but fewer exams are scheduled during this time.
- August: August is generally a quieter month for GMAT exams as students prepare for the upcoming academic year or take vacations. Availability may be limited during this month.
- September: September is often a busy month for college students, and fewer GMAT exams may be available during this time as they focus on their studies.
- October: October is another month when availability may be less due to students settling into their academic routines and dedicating less time to GMAT preparation.

Conclusion:
GMAT exams are generally more available during the months of January, February, March, April, and June. These months coincide with application deadlines and provide ample time for test takers to prepare. On the other hand, the availability of GMAT exams may be relatively less during the months of May, July, August, September, and October. It is advisable for test takers to plan their exam dates well in advance to secure a suitable slot.