Why did “invasibility” win over “invadability”?

When it comes to general and ecological usage , there is no doubt that invasibility has won against invadability. For illustration, here is a Google Ngram of the two: (Interestingly, it’s not so clear for invasible vs. invadable. ) In ecological papers, Google Scholar finds invadability ca. 1000 times, but invasibility 28.000 times¹. However, from both intuition and my understanding of language, I…