plot with different values for each axis

[sam.snow]

Hi all,

I'm having trouble with doing regular plotting. I have two sets of data, one is moisture amount and the other is time. But time is not a consistant number. so for example, first column would consist of 0.1, 0.5, 0.3, 0.2, etc (mm) and second column would be 1, 9, 11, 24, 45, 85, etc (seconds).

Now I want to make a plot out of this, but I don't know what to do to make the axis to be the right one.

I would be very happy if someone can help me out. Thank you in advance.