De Broglie Wavelength

There was a physics passage in TBR that explained that an increase in the momentum of an electron = an increase in velocity, which would decrease the electron wavelength.

I thought that velocity = lambda * frequency, so I thought an increase in velocity would cause an increase in wavelength (direct relationship). Does this not apply in the case of an electron/quantum mechanics for some reason?

I did an internet search and found this relationship; lamda = h/mv, where velocity and wavelength...

De Broglie Wavelength