How to use "Wait statement" in Selenium Webdriver Script

public void implicitWaitforSeconds(WebDriver driver, int time) {
        driver.manage().timeouts().implicitlyWait(time, TimeUnit.SECONDS);
    }

public void explicitWait(WebDriver driver, int time, WebElement element) {
    WebDriverWait wait = new WebDriverWait(driver, time);
    wait.until(ExpectedConditions.visibilityOf(element));
}

public void pageloadforSecond(WebDriver driver, int time) {
    driver.manage().timeouts().pageLoadTimeout(time, TimeUnit.SECONDS);
}

public void fluentWait(WebDriver driver, int timesec, int timemilisec) {
    FluentWait<WebDriver> wait = new FluentWait<WebDriver>(driver);
    wait.withTimeout(timesec, TimeUnit.SECONDS);
    wait.pollingEvery(timemilisec, TimeUnit.MILLISECONDS);
    wait.ignoring(NoSuchElementException.class);
    wait.until(ExpectedConditions.presenceOfElementLocated(By.xpath(xpathExpression)));
}

driver.manage().timeouts().implicitlyWait(20,TimeUnit.SECONDS);

WebDriverWait wait = new WebDriverWait(driver, 20);
wait.until(ExpectedConditions.visibilityOf(element));

driver.manage().timeouts().pageLoadTimeout(20,TimeUnit.SECONDS);

FluentWait<WebDriver> wait = new FluentWait<WebDriver>(driver);
wait.withTimeout(60,TimeUnit.SECONDS);
wait.pollingEvery(2,TimeUnit.MILLISECONDS);
wait.ignoring(NoSuchElementException.class);
wait.until(ExpectedConditions.presenceOfElementLocated(By.xpath(xpathExpression)));

thread.sleep(2000);