| 单词 | frequency |
| 释义 | Word Frequency frequency(ˈfriːkwənsɪ) nounWord forms: plural -cies Also called (for senses 1, 2): frequence1. the state of being frequent; frequent occurrence 2. the number of times that an event occurs within a given period; rate of recurrence 3. physics the number of times that a periodic function or vibration repeats itself in a specified time, often 1 second. It is usually measured in hertz Symbol: ν, f4. statistics a. the number of individuals in a class (absolute frequency) b. the ratio of this number to the total number of individuals under survey (relative frequency) 5. ecology a. the number of individuals of a species within a given area b. the percentage of quadrats that contains individuals of a species Word origin C16: from Latin frequentia a large gathering, from frequēns numerous, crowded |
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