Barry can I answer this
There is no set speed to freeze action. Why? well it depends on how far away the subject is and how fast its moving. Again there are two situations regarding freezing action and that is panning with a camera to freeze the subject with blurred background (following the subject) or having the camera looking at a fixed point and the subject going across what the camera is looking at, such as a stream for example.
Then it depends on how "fast " a lens is. An f2.8 lens will allow a camera a higher shutter speed ( more light onto the sensor) than say an f5.6 lens.
Another factor assuming daylight is how bright the day is, A sunny day ( whatever that is) will allow a faster speed than an overcast dull day, which will produce a different camera setting altogether
Also The ISO setting has to be taken into consideration as Shutter -ISO -Aperture all work in conjunction with each other. Gets confusing doesn't it
I would suggest putting your camera into Aperture priority and take a picture of a moving subject then without editing download something like KUSO exif and check what the camera readout is from there.
Link
http://kuso-exif-viewer.softpedia.com/
Once downloaded all you do is right click over the picture and the 4th one down on the drop down list will be Kuso which gives more details about you picture than you will imagine and even more if you tick the box at the top of Kuso
Oh and its a free download
You don't say what camera you are using but if you can set the camera to focus priority before shutter release will help a lot. A1 and A2 setting on the Nikon D300
If you are just starting out with a DSLR don't try and do/learn everything at once it makes things much harder. Obviously you don't want to use auto mode and let the camera work everything out for you, nor do you want to go into manual mode until you get used to different settings.
Photography is a case of the more you know the more there is to learn.
Anyway that's the basic answer to your question
Realspeed