estuvo confeccionando
-he/she was making
,you were making
Preterite progressiveél/ella/ustedconjugation ofconfeccionar.

confeccionar

Como emana de lo anteriormente dicho, nuestro calendario hasta que se logró su aspecto actual, se estuvo confeccionando casi dos mil años.
From the above information we can conclude that our calendar was being created to achieve its current form for over two thousand years.
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to boo