C. Frecuentenente
A menudo means to do something frequently. Frequently translates to frecuentmente
Answer:ok
Explanation:Each scheme complies with the corresponding characteristics
Verb: cantar
Yo canto - Cantaba
Tu cantas - cantabas
Èl/Ella/Usted canta - Cantaba
Nosotros cantamos - cantabamos
Ellos/Ellas/Ustedes cantan - cantaban