Question: Which American magazine is published more often, Watercolor Artist or Hot Rod?

Context paragraphs:
Volvo T6: The Volvo T6 was a concept car from Volvo presented in 2005 at SEMA.  There was just one hand-built copy, although there was some discussion about a limited production run.  It is powered by a twin-turbocharged 2.9-liter inline 6-cylinder engine from Volvo S80 giving 300 bhp and a top speed of 205 mph .  The engine is located behind the driver.  Its design is obviously inspired by hot rod cars.  It was named the 2004 "Hot Rod of the Year" by Hot Rod Magazine.  It was designed by Per Gyllenspetz from Labyrint studio and built by Leif Tufvesson.  Many believe the shape and body to take inspiration from the Plymouth Prowler because much like the Prowler, the T6 was designed to be a modern take on the classic hot rod.

Ala Kart (custom car): Ala Kart is a custom car, a customized 1929 Ford Model A roadster pickup, built by George Barris, Richard Peters, and Mike "Blackie" Gejeian in 1957.  Originally owned by Peters, it is a two-time winner of the Grand National Roadster Show "America's Most Beautiful Roadster" (AMBR) trophy (1958 and 1959) and "Hot Rod" cover car in October 1958.  Featured in hundreds of car shows, Ala Kart has won more than 200 trophies.  It has also made numerous appearances in movies, usually in the background of drive-in shots,<ref name="Hot Rod, 12/86, p.29 sidebar">"Hot Rod", 12/86, p.29 sidebar. </ref> and dozens of magazine articles since.  It is considered "one of the most iconic hot rods ever built."

Don O'Neill: Don O'Neill (1924–2007) was a United States watercolor artist most noted for his depictions of historic downtown Riverside, California.  An architect by trade, he began painting in the 1960s, and eventually became Riverside's premier watercolorist.  O'Neill became the first resident of Southern California's Inland Empire to be accepted into the American Watercolor Society.

Hot Rod Lincoln: "Hot Rod Lincoln" is a song by American singer-songwriter Charlie Ryan, first released in 1955.  It was written as an answer song to Arkie Shibley's 1951 hit "Hot Rod Race" which describes a race in San Pedro, Los Angeles between two hot rod cars, a Ford and a Mercury, which stay neck-and-neck until both are overtaken by "a kid in a hopped-up Model A".  "Hot Rod Lincoln" is sung from the perspective of this third driver, whose own hot rod is a Ford Model A body with a Lincoln-Zephyr V12 engine, overdrive, a four-barrel carburetor, 4:11 gear ratio, and safety tubes.

Hot Rod (magazine): Hot Rod is a monthly American car magazine devoted to hot rodding, drag racing, and muscle cars — modifying automobiles for performance and appearance.

Fender Hot Rod Deluxe: The Fender Hot Rod Deluxe is a guitar amplifier manufactured and sold by the Fender Musical Instruments Corporation.  It was introduced in 1995 as part of the "Hot Rod" line of guitar amplifiers and has been in continuous production since.  The Hot Rod Deluxe is a modified version of the Fender Blues Deluxe from the earlier Blues line of amplifiers, and has a higher level of gain in its preamplification signal.  This model, along with the Hot Rod Deville, were originally designated as F.A.T. ('Fender American Tube') amplifiers but this moniker was dropped in 2002 when production of this series of amps was moved from Corona, CA to Fender's Baja-Ensenada, Mexico manufacturing facility.

Roadkill (Internet show): Roadkill is an automotive-themed internet show produced by Motor Trend and Hot Rod magazine, two magazines from .  Hosted by former Hot Rod Magazine Editor-in-Chief David Freiburger and Staff Editor Mike Finnegan, Roadkill is part do-it-yourself auto repair show and part buddy road trip.  It is a lighthearted celebration of classic muscle car culture in which poor planning and perpetual lack of sleep often produce humorous results.  Roadkill cars break down early, often, and in unexpectedly humorous ways.  The show embraces these failures and honestly documents the good-natured duo’s efforts to persevere and to triumph over any roadside adversity.

Hot Rod (rapper): Rodney Toole (born June 25, 1981) better known by his stage name Hot Rod (formerly Young Hot Rod), is an American recording artist from Phoenix, Arizona.  In 2006, Hot Rod secured a recording contract with New York City-based rapper 50 Cent's G-Unit Records.  In 2010 he was moved to G-Note Records, a subsidiary label of G-Unit Records, which focuses on pop, dance and R&B music.  Currently canoodling with K Steezy in Phoenix, Arizona.  Arizona He is also a poster on the hip-hop forum The Coli.

Watercolor Artist: Watercolor Artist, formerly Watercolor Magic, is an American bi-monthly magazine that focuses on watermedia techniques, trends and artists.  As of June 2006, it had a print run of more than 90,000.

The Green Leaf: The Green Leaf is an experimental rock & roll band from San Diego, California led by Mark Whitney Mehran (MWM).  The Green Leaf was formed in 1992 and released its first full length original album titled Green Leaf in 1995.  MWM composes, arranges, and plays all of the instruments and vocals on The Green Leaf recordings after 1996.  In the 1990s The Green Leaf toured the independent music club scene for a number of years playing live shows as a traditional three piece rock outfit.  In 2007 Mark Whitney Mehran teamed up with Harley Davidson of Deadbolt (band) to record original instrumental music for the HOT ROD SURF How To Service Your Hot Rod!  movie.  The Green Leaf music is published by HOT ROD SURF Publishing (ASCAP).

Supporting paragraphs: Watercolor Artist Hot Rod (magazine)
Answer: Hot Rod