unmethodically

As the years rolled by, I unmethodically accumulated other books by or about the leading creative spirits of the late 19th century.

For what glorious results may we not look when children from their earliest years learn that which is essential, but which now, alas! is picked up unmethodically and by chance? 

You can see that the insect has cut them out hurriedly, unmethodically and on a different pattern from that of the pieces intended for the cells.