How to set even Keyframes?

Here's what I would do with 10 keyframes.

1. Set the CTI to the first keyframe
2. Press Shift + Ctrl/Cmnd + Right Arrow to move forward in the timeline 10 frames
3. Select the second keyframe and drag it to the CTI (snap enabled)
4. Repeat with the next 8 keyframes
5. Move the CTI to the point in the timeline where you want the last keyframe
6. Select the property to select all 10 keyframes
7. Hold down the Alt/Option key and drag the last keyframe to the CTI and all 10 will be evenly spaced.

Just tried it with 10 keyframes - took me less than a minute.

If you have a hundred keyframes this won't be very quick, but with 10, it's all you need.

Second option:

Set the CTI on the first keyframe, press the * key to add a layer marker, press Shift + Ctrl/Cmnd + Right Arrow to move down the timeline 10 frames, press the * key to add another layer marker, repeat as many times as needed, Hold down the shift key and drag the keyframes to the markers in order, use the Alt/Option + drag last keyframe to adjust the spacing.

Someone got an idea? I still can't figure it out how to even the keyframes

I used an old technique to do this. If you copy your Keyframes and paste it into a Notepad or Textedit file, you should see the info of your keyframes as a text. Under the Frame column, you can change the number to set the duration interval you need between them. Then, copy again this text and paste it into you parameter in After Effects. Your keyframes will be set at the position you changed in the text file.

I'm looking for a script at aescripts but not sure if exists something to do this automatically.