Today I had to align a table at only the first multiple spaces on a line.

p.e. 

```
<ScrollWheelDown>    move window     three lines     down  
<S-ScrollWheelDown>     move window    one page   down
<ScrollWheelUp>        move window      three lines up
<S-ScrollWheelUp>    move window   one page      up

```

I use Tabular plugin to align tables but I could not find a way how to find only the first occurrence of multiple spaces and do an align only there.

I don't know it either in VIM:
What will be the regex if I only want to find the 3rd occurrence of a pattern on a line?
Is the regex the same as using Tabular?