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QUICK ANSWER
"Not as much" is a phrase which is often translated as "no tanto", and "not so much" is a phrase which is also often translated as "no tanto". Learn more about the difference between "not as much" and "not so much" below.
not so much(
nat
so
muhch
)A phrase is a group of words commonly used together (e.g., once upon a time).
2. (not even)
a. ni siquiera
Not so much as a phone call was made to the families.Ni siquiera se hizo una llamada de teléfono a las familias.
b. ni tan siquiera
I never had a pet as a child, not so much as a hamster.Nunca tuve una mascota de niño, ni tan siquiera un hámster.
