You can create a conditional text field that displays the word "pages" instead of "page" in conjunction with a page count field if your document contains more than one page.
Place the cursor in your document where you want to insert the page count.
Choose Insert - Field - Page Count, and then enter a space.
Choose, and then click the tab.
Click "Conditional text" in thelist.
Type Page > 1 in the box.
Type Pages in the box.
Type Page in the box.
Click New, and then click Close.