Applying a paragraph style to text frames in document

Hello everyone! Not sure what I am doing wrong here, and I am having trouble finding examples of this online, so I thought I would ask.

var docRef = app.activeDocument;

var textRef = docRef.textFrames;

var paraStyle = docRef.paragraphStyles.getByName ("LeftIndent");

var iCount = textRef.paragraphs.length; //This is the error that shows up.

for(var i=0; i<iCount; i++) {

paraStyle.applyTo(textRef.paragraphs[i], true);

}

redraw();

Thanks in advance!!