does anyone know how onofre de avila and francisca de lerma relate to each other

i found this marriage dispensations below
https://familysearch.org/pal:/MM9.3.1/TH-1-18413-1697-38?cc=1874591&wc=M99L-KSX:n1730706213

and it says that they are second cousins once removed, but it doesn't explain how. can anyone help me out here