here's something I worked up with AI and it took 20 minutes of pushy prompting. The objective was - what could we say about the 20th century rise of colonia waters in spain, as it went through its Industrial Revolution and a working man might have money to spare on such a non necessity.
Start with these stats:
Across Europe, a weekly “Saturday-night bath” was widely customary in the early 20th century; daily bathing became common later. That’s attested in general histories (and even period writing like The Atlantic, 1916). 
For Spain specifically, infrastructure data shows why frequent bathing would have been hard for many households even decades later: in 1950, 66% of Spanish dwellings lacked running water and 48% lacked a toilet; municipal public baths in Madrid were still serving people without a bathroom well into the 1970s. Those facts support (but don’t numerically prove) that many working-class families couldn’t bathe daily in earlier decades.
So, did people use colonia for to replace bathing? Average folks? Highly unlikely.
~1900-1930 Mostly rural, modest incomes, limited infrastructure; colonia or scented waters are luxury or imported; most people scent themselves lightly, less frequent access
Very low usage among working classes; colonia only in cities or among those with stable income Interwar / Post-Civil War
~1930-1950s - After wars, scarcity, rationing, autarky: imported luxury limited; local perfume houses begin producing “colonias” designed for domestic market; infrastructure improving slowly More modest use in cities; colonia becomes affordable “luxury” for middle class; working class may use in special occasions
Boom / “Miracle” phase ~1959-1970s
Economic growth, rising wages, expansion of urban infrastructure (water, plumbing, sanitation), mass production, improved distribution, introduction of cheaper synthetic aroma materials
Rapid growth in colonia usage across classes; colonia waters become regular, everyday purchase; cheap splash / family sized bottles common
Late 20th century ~1980-2000
Globalization of perfume chemicals, domestic and international brands competing, nostalgia markets, mass advertising, expansion to rural and suburban regions
Millions of gallons/year consumed; colonia becomes mostly “common people’s scent”; almost everyone knows / uses colonia daily or frequently