Institution: Directorate of Primary Education - DPE Exam: Primary Exam Question Solution 21-06-2019
Topic: Noun, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The term "frequency" is classified as a noun because it refers to the concept of the number of times an event occurs in a specified period. In linguistic terms, nouns are words that identify people, places, things, or ideas. "Frequency" specifically denotes a measurable attribute, often associated with time or occurrence, such as how many times something happens.

For instance, in scientific contexts, "frequency" might describe the number of cycles of a wave that occur in one second, measured in hertz (Hz). In everyday language, it can refer to how often one attends a meeting or performs an action.

In contrast, adverbs modify verbs or adjectives, verbs express actions or states, and adjectives describe or modify nouns. Since "frequency" does not perform an action, describe a characteristic, or modify another word, it fits the definition of a noun. This distinction clarifies why "frequency" is correctly identified as a noun in the context of the provided options.