How do you draw a cumulative frequency histogram?

Draw your plan with your variables (forgive the approximative vocabulary, I'm not native) on the X axis, and with the cumuled frequencies on the Y axis. (exemple: A==0.1; B==0.12, C==0.6 etc will imply marks at the following frequencies on your Y axis : 0.1 ; 0.22; 0.82). After that, draw your function/cells/whatever you chose!