I know there are a lot of albums but.. the main feature of the song is it has a relatively long pause/silence in the middle - say at least 30 seconds.. its kinda slow/chilled. It *might* be on the album with Stairway To Heaven, Led Zeppelin "IV". Please, all suggestions welcome!!
Moby Dick? From another website with guitar tabs on it: There is a long pause in the middle where Bonham goes off, which is good for drummers but not for us.
Could be 'How Many More Times' from the first album. That has a slow bowed guitar section for about 30 seconds in it.