Taken for Spanish retail and for travel and hospitality platforms, where prices move in seasonal waves.
Seasonality changes the schedule
On travel platforms, prices update several times a day in season and slowly outside it. A fixed daily check fits one half of the year and misses the other.
Regions serve different content
Parts of the retail market serve different catalogues by region. If that matters, sample from several addresses across the country.
Size the pool on the peak
When the frequency of checks rises in season, the pool has to cover the peak. An average figure will leave you short exactly when the data matters.
Latency
Short across southern Europe, moderate to the north. A comfortable seat for Iberian work.
