连续运行功能，需要计数动作

我正在使用眼动追踪，我正在尝试计算用户在屏幕上查看特定位置的次数。问题是，当用户盯着某个指定区域时，它会一直计数，直到用户把目光移开。有没有办法设置一个超时函数或防止函数计数连续?

function onGazePoint(gazePoint) {
latestGazePoint = gazePoint;
overwolf.windows.getCurrentWindow(function(result) {
    if (result.status == "success") {
        if (isGazePointWithinWindow(result.window, gazePoint)) {
            document.getElementById("content").style.opacity = "1.0";
            /*var hotspot = ;*/
            var hotspotNum = document.getElementById('content').getAttribute('data-value');
            /*document.getElementById("hotspotnr").innerHTML = hotspotNum; */
            console.log(hotspotNum); 
            var hotspot = 0; 
            switch(hotspotNum) {
                case '1':            
                    document.getElementById("numberOfLooks").innerHTML = maplooks++; 
                    break;
                case '2':
                    document.getElementById("numberOfLooks").innerHTML = hotspotNum; 
                    break;
                case '3':
                    document.getElementById("numberOfLooks").innerHTML = hotspotNum; 
                    break;
                case '4':
                    document.getElementById("numberOfLooks").innerHTML = hotspotNum; 
                    break;
                default:
                    console.log(new Date().getTime(), hotspotNum); 
            }
        } 
        else {
            document.getElementById("content").style.opacity = "0.4";               
        };
    }
});

}