Correct Answer: Infrequent

Solution : The first option is the correct answer.

"Sporadic" suggests occurrences that are scattered, unpredictable, and lacking a consistent pattern, often occurring randomly or intermittently. On the other hand, "infrequent" implies occurrences that happen seldomly or rarely.

The meanings of other options are as follows:

• Ample means plentiful or abundant, indicating an adequate or more than sufficient amount of something.
• Methodical describes a systematic and orderly approach to doing things.
• Regular signifies something that occurs consistently or at fixed intervals.

Therefore, the correct answer is infrequent .