Calculating the period, frequency, and confirming multimeter readings
For the  first picture, your oscilloscope was set for a horizontal scale of 2.00 microseconds per division and a vertical scale of 2 volts per division.  Since one period of your signal occupied 4 horizontal divisions, the period is 4X2 = 8 microseconds.  Taking the reciprocal of 8 microseconds yields a frequency of 125 kHz. The vertical extent of your signal is 8 divisions so that the peak-to-peak amplitude is 8X2 = 16 volts. These values agree with your generator settings. Your multimeter reading is probably not valid because most multimeters cannot measure frequencies that high. I can't be certain since you didn't identify model of your multimeter.

For the second picture, your oscillscope settings are 1 volt per division and 1 microsecond per division.  Your waveform occupies 5 vertical divisions and 3.3 horizontal divisions.  Thus it is 5X1 = 5 volts peak-to-peak and 3.3X1 =3.3 microsecond period.  Thus the frequency is the reciprocal of 3.3 microseconds or 300 kHz.  Again, these values agree with your generator. Your multimeter reading is close to the average value of your waveform (5/2 volts) but again, this frequency is probably too high for it.