Set interval on jQuery hoverIntent

I am using the jQuery hoverIntent plugin and I love it. However, I am having trouble setting a custom interval. My jQuery is:

   var hoverSetting = {
                            sensitivity: 4,
                            interval: 75,
                        };

                        navItem.hoverIntent(function(hoverSetting) {
                            if (searchIsVisible == false) {
                                overlay.delay( 500 ).css('display', 'block');
                                $(this).find('ul').toggleClass("active");
                                overlayIsVisible = true;
                            }
                        });

How can I make the interval at which hoverIntent works custom (I would like to slow it down)

Use this syntax instead:

var handleInOut = function(){
           if (searchIsVisible == false) {
                overlay.delay( 500 ).css('display', 'block');
                $(this).find('ul').toggleClass("active");
                overlayIsVisible = true;
            }       
       };

navItem.hoverIntent({
   over: handleInOut,
    out: handleInOut,
    sensitivity: 4,
    interval: 750
});