Listenership

While Soviet jamming is intense, particularly in the vicinity of Moscow, we have evidence that "Voice [of America]" programs can be heard in areas 25 miles from Moscow and that there are listeners in numerous cities throughout the Soviet Union. Listenership in the satellites, according to refugees, is widespread.

Source: wiktionary

[A]n increase in VOA [Voice of America] audience size may well have been concealed by a change in recording listenership. In all, VOA tied for third in listenership among foreign stations.

Source: wiktionary

In the late sixties, as if the result of some galactic explosion, the popular idiom splintered and broke into so many components that a microscopic analysis of each is a difficult if not Herculean task. The cause of this diffusion can be traced to several sources. One was the rapid acceleration and increasing listenership to FM radio, whose alternative programming deviated from hard-rock to progressive country & western, from album cuts to singles, from lush strings to neo-jazz, and away from banal top-forty disc jockeys towards mellowed diplomats who were more influenced by orchestration than sensation.

Source: wiktionary

On the other hand, listenership figures from SABC [...] indicate that Radio Metro, an English-medium music programme oriented to urban blacks has one of the highest listenerships of all stations among blacks.

Source: wiktionary