According to the Hihopofficial ~ Clipse interview, The Neptunes have  about 8-9 tracks  on “Till The Casket Drops

Clipse – Till The Casket Drops (2009) (September 29th)
Producers & Guests
: The Runners, Swizz Beatz, Rick Rubin, Sean & LV, Justice League, Dame Grease, The Neptunes, Danjahands, DJ Khalil, Reefa, Boi 1-Da, Keri Hilson, Kenna, Cam’Ron, Timbaland, Scott Storch…
Confirmed Tracks:
– Kinda Like A Big Deal feat. Kanye West (DJ Khalil)
– Popeye feat. Pharrell & Cam’Ron (Neptunes)
– Wretched Pitiful Poor Blind & Naked feat. Pharrell & Kenna (Neptunes)
– I’m Good feat. Pharrell (Neptunes)
– Eyes On Me feat. Pharrell & Keri Hilson (Neptunes)