"allows of" is correct and usable in written English.
It is used to indicate that something is capable of happening or existing. Example: His job allows of frequent travel.
She is, as he poignantly allows, of little significance in the greater scheme of things.
It is shown that the optimization problem allows of decomposition into two successively solvable problems.
The Piano Teacher is not a film that allows of any moments of comedy or gentleness, and is therefore arguably deficient in humanity.
When Chardin painted the attributes of art in the 18th century he made them sit as still as the lions outside the New York Public Library, but in 1981 they are part of a flux that allows of no absentees.
France had had more of the ball but there is a simplicity to England's game under Jones, an uncomplicated approach that allows of them to offset a lack of a gain line breaker in midfield by creating the space to pass the ball quickly and slickly across the back line.
This method allows of controlling slow changes in the spatial orientation of the rotation axis of the satellites in which specular reflection of light from flat faces of the surface is inherent.
