Below, a quote from Conrad; three sentences in eight hours, all erased.
I sit down religiously every morning, I sit down to eight hours every day—and the sitting down is all. In the course of that working day of eight hours I write three sentences which I erase before leaving the table in despair. There’s not a single word to send you. Not one! … sometimes it takes all my resolution and power of self-control to refrain from butting my head against the wall. I want to howl and foam at the mouth but I daren’t do it for fear of waking the baby and alarming my wife. … So the days pass and nothing is done. At night I sleep. In the morning I get up with the horror of that powerlessness I must face through a day of vain efforts.
Conrad, J. 1898. The Collected Letters of Joseph Conrad