Sentence:  Three <WSD>seconds</WSD> flat is the usual time , and the space is crossed by moderate mileage , while the overwhelming immensity of such journeys must be conceived as a static pulsation through an enormous number of coexistent frequencies which perpetuate all events . 
Meaning of the word marked with <WSD> tags:  1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites