read·er·ship 
/ˈri:dɚˌʃɪp/ noun
plural read·er·ships /ˈri:dɚˌʃɪp/ noun [count] 1 : the number or group of people who read a particular newspaper or magazine — usually singular ▪ The magazine's readership decreased when the editors changed the format. ▪ an enthusiastic/devoted readership ▪ The newspaper has a readership of around 5,000. 2 or Readership Brit : the position of a reader at a university
▪ She holds/has a readership in chemistry.
▪ She holds/has a readership in chemistry.
