Believer's baptism was revived by the Anabaptists on January 21, 1525, when Conrad Grebel baptized George Blaurock. These Anabaptists believed that only believer's baptism was legitimate and effective. There is no agreement on when believer's baptism ceased to be practiced in early Christianity. It continued to be widespread through at least the 4th century. Between early Christianity and the Anabaptists, virtually all Christians practiced infant baptism.
There have been efforts by Baptist and Anabaptist historians to draw connections between Anabaptists and earlier pre-Reformation groups. These connections are generally based on sociological and spiritual similarities, not direct influence or succession. One form of this historiography is Baptist successionism, which claims an unbroken chain of groups who were adhered to Anabaptist-like faith and practice in the face of an evil/wayward dominant Catholic majority. This narrative has been spread especially by the influential Anabaptist Martyrs Mirror (1660) and the Plymouth Brethren The Pilgrim Church (1931). Many such works are historically dubious and are prone to the confirmation bias of finding what they are looking for.
It is difficult to prove the negative claim that no one practiced adult baptism in a given era. However, if you want to find an era without believer's baptism, I'd read one of those and look for the time when they have the weakest case in demonstrating their claimed predecessors practiced believer's baptism.
As a sidenote note, I would presume that practitioners of infant baptism in most eras baptized adult converts.