Q: If both, then is one more common?
A: both is by far most common, but to be honest now that i re-read your question it doesn't make very much sense to me. if you only have instrumentals and lyrics, you'll still be missing a lot.... like the whole melody (pitches) being sung for the lyrics. in any case, the lyric+melody+chords are all dependent on each other so for best results they will all come into existence simultaneously