Ekklesia is used in the NT 115 times (actually only a few/couple times in the gospels, so mostly in the epistles). In the Tindale translation (1524) it was translated “congregation.” In the King James it was translated “church.” ’assembly’ is a good translation.
Very interesting word. Various references below. According to the acu link below, it means called to assembly, but ‘called out,’ in the sense of being called to be different, is not accurate (but preachers may like to say that).