How to find the number of executions for a specific SQL ID during a day

This query will gather data from DBA_HIST_ACTIVE_SESS_HISTORY for a specific day, and count the number of executions within that day:

select to_char(sample_time,'dd.mm.yyyy hh24') "day", count(*) "num executions"
from DBA_HIST_ACTIVE_SESS_HISTORY 
where sql_id = '7x0v1s9aq4y9t'
and to_date(to_char(sample_time,'dd.mm.yyyy')) = '05.08.2019'
group by to_char(sample_time,'dd.mm.yyyy hh24')
order by 1 desc;

day	num executions
05.08.2019 23	302
05.08.2019 22	285
05.08.2019 21	333
05.08.2019 20	300
05.08.2019 19	393
05.08.2019 18	255
05.08.2019 17	351
05.08.2019 16	426
05.08.2019 15	450
05.08.2019 14	624
05.08.2019 13	842
05.08.2019 12	621
05.08.2019 11	503
05.08.2019 10	461
05.08.2019 09	444
05.08.2019 08	279
05.08.2019 07	148
05.08.2019 06	79
05.08.2019 05	77
05.08.2019 04	80
05.08.2019 03	3396
05.08.2019 02	3680
05.08.2019 01	2808
05.08.2019 00	123