It is about one-fifth as common as the long ship but almost 2,000 times as common as the long^3 ship.
A decent number of very long ships, although not enough to be almost all, form from the right half of generation 7 of the following pattern, where generation 0 is a bakery predecessor with one cell moved to an adjacent location. The very long ship forms in generation 17. Some of them go through the sequence shown here, while others reach generation 7 in a different way. Because this is a common predecessor, the very long ship is often accompanied by two nearby boats.
↑ MathAndCode (October 16, 2021). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums, second code block, top row, second from left, unintentional