frequency

Thân thiện

The scientist records the frequency of the bird's chirps.

Definition

1. Noun:
   • The rate at which something occurs or is repeated over a particular period of time. This is the most common meaning, referring to how often an event happens.
   • (Physics) The rate at which a vibration or wave occurs, measured in hertz (Hz). This refers to the number of complete cycles per second of a periodic phenomenon, such as sound or radio waves.
   • (Statistics) The number of times a particular value or observation occurs in a dataset.

Usage and Examples

• General Usage (How often something happens):

  • The frequency of bus services decreases after midnight.
  • She noted the increasing frequency of power outages in the neighborhood.

• Scientific/Technical Usage (Wave cycles):

  • This radio station broadcasts at a frequency of 98.5 MHz.
  • Humans can hear sounds with a frequency between 20 and 20,000 Hz.

• Statistical Usage (Count of occurrences):

  • In the survey, the frequency of 'yes' responses was 150.
  • The graph shows the frequency distribution of test scores.

Advanced Usage

• "With increasing frequency": Happening more and more often.

  • Complaints about the service are arriving with increasing frequency.

• "High/Low frequency": In general language, this can describe commonness or rarity. In physics, it describes the specific property of a wave.

  • High-frequency words are learned first by language students. (General)
  • Dogs can hear high-frequency sounds that are inaudible to humans. (Physics)

Variants and Related Words

• Frequent (adjective): Happening or occurring often at short intervals.
  • He is a frequent visitor to the library.
• Frequently (adverb): Often.
  • The software is frequently updated.
• Infrequency (noun): The state of being not frequent; rarity.
• Frequency Modulation (FM): A compound term for a specific method of encoding information on a carrier wave by varying its frequency.

Synonyms

• Rate: The speed or frequency with which something happens.
• Commonness: The state or quality of being frequent or occurring often.
• Prevalence: The fact or condition of being prevalent; commonness.
• Hertz (Hz): The unit of frequency in physics, meaning one cycle per second. (This is a specific unit synonym in technical contexts).

Related Phrases and Collocations

• Adverb + Frequency:
• Verb + Frequency:
• Prepositional Phrases:

Học thuật

Noun

1. the number of observations in a given statistical category
2. the ratio of the number of observations in a statistical category to the total number of observations
3. the number of occurrences within a given time period
   • the frequency of modulation was 40 cycles per second
   • the frequency of his seizures increased as he grew older

Từ đồng nghĩa

• absolute frequency
• relative frequency
• frequence
• oftenness