No, you can not take your good kitchen knives and put in freezer to sharpen them. It will not work as the steel is not made the same way as the thermomix blades.
To sharpen your knife i recommend you buy a double sided or two stones (coarse and fine) and a sharpening steel. None of it very expensive and pretty easy to learn how to use. I think you can find free videos on the net that will show you how to use both of them.
When your knife is sharp you should be able to make at least 20 slices out of a medium sized ripe tomato. Thats what i tell my assistants to do when they learn to sharpen knifes.
