# Duration of downsampled signal in analog frequency axis

Suppose, I sampled a signal, $$x(t)$$ and let $$x[n]$$ be the sampled signal of $$x(t)$$. Let then I downsampled $$x[n]$$ by a factor of $$M=3$$. Let $$x[n]$$ after being downsampled by the factor of $$M=3$$ yields $$y[n]$$.

Now, my question is: if I plot the frequency spectrum of $$y[n]$$ along y-axis with frequency (in Hertz) along x-axis, then, will I get only $$M=3$$ copies of frequency scaled version of the original spectrum(spectrum of the original signal, $$x(t)$$) or I will get infinite copies of the original spectrum ?