How many {unit symbol} are for {minute} ?
The minute has what unit symbol?
What is the unit symbol for a minute?
SELECT ( COUNT ( ?n ) AS ?s ) { resource:minute property:unit_symbol ?n }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q7727> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P5061> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q7727 wdt:P5061 ?obj }
1