def insert_newlines(string: str, every: int) -> str:
    """
    Inserts multiple line breaks.

    :param string: input string to be broken into multiple lines
    :param every: gap in number of characters between every line break
    :return: the input sting with line breaks
    """
    return '\n'.join(string[i:i + every] for i in range(0, len(string), every))