Nine is written as a bar and four dots, the last coefficient before the second bar appears at ten. Nine has a distinct presence in Classic Maya date recording: the supplementary series that follows the Tzolk'in day in a full Initial Series includes a glyph from a set of nine, cycling every nine days, which epigraphers label G1 through G9 and identify with the Lords of the Night.
That nine-day cycle runs alongside the 260-day and 365-day counts as a third independent period, and colonial Yucatec sources name a group of nine deities, the Bolon Ti Ku, against a group of thirteen, the Oxlahun Ti Ku. Nine is also the number of levels commonly given for the underworld in Postclassic Mesoamerican cosmology.
Maya numerals are written with a dot for one and a bar for five, and the coefficient of a day is written in exactly that way in the inscriptions, set beside the day sign in its cartouche. The system is positional and includes a sign for zero, which is why the Long Count can be written as a string of places, but within the 260-day count no number above thirteen ever occurs and the notation stays simple.
Solar, the modern name for this coefficient, belongs to Jose Arguelles's Dreamspell of 1987 and not to any of this material. The Lords of the Night are a genuine and separate Maya cycle; the Dreamspell tone names are a twentieth-century overlay on the coefficients, and the two have nothing to do with each other.
Sources Maya Hieroglyphic Writing: An IntroductionJ. Eric S. Thompson with Dreamspell: The Journey of Timeship Earth 2013Jose Arguelles