Ach, a quandary already

Canon 904 says "priests are to celebrate [the Mass] frequently; indeed daily celebration is strongly recommended, since even if the faithful cannot be present, it is the act of Christ and the Church in which priests fulfill their principal function."

Yet, two canons later, we read: "A priest may not celebrate without participation of at least some member of the faithful, except for a just and reasonable cause."

So, uh, which is it? Frequent Mass celebration even without anyone else visibly present, or only celebrating in the presence of even a few of the faithful?

(By the way, I think from here on out I may call my canon law quandaries "candries." So, this post a week from now would be, "Ach, a candry already".)