Frequency spectrum element, carrier frequency. Frequency type can be specified.

频谱元件，载波频率。可指定频率类型。

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A portrait type that appeared with relentless frequency in eighteenth-century England is the familiar image of a gentleman poised with one hand inside his partially unbuttoned waistcoat.

18世纪英国出现频率极高的一种肖像类型，是人们熟悉的绅士单手插在部分没有扣子的马甲里的形象。

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MS. PSAKI: -- you probably saw this or you may have been en route -- he did talk about the need to do some soul-searching, because of the frequency of the type of events, tragic events, that happened this past weekend and in Colorado.

WHITEHOUSE: The White House

Suggestions to improve the system included the publication of both reoffending rates and the type and frequency of offences in a particular area.

BBC: Manx public call for more 'accountability' of courts

The company agreed to provide data identifying the frequency and duration of repairs, engine type and contract type.

FORBES: Magazine Article