display count of hostnames in first day of week have last_seen>30 days

[cipi23]

for 08.07.19 count number of hostnames that have last_seen > 30 days
for 01.07.19 count number of hostnames that have last_seen > 30 days
for 24.06.19 count number of hostnames that have last_seen > 30 days
for 17.06.19 count number of hostnames that have last_seen > 30 days

the output will look like this
week1 count
week2 count
week3 count
week4 count

all this i need to do in one search please help

[woodcock]

Like this:

index=<You Should Always Specify index=> AND sourcetype=<And sourcetype= Too> AND (host= 08.07.19" OR host="01.07.19" OR host="24.06.19" OR host="17.06.19") earliest=-4w
| timechart useother=f usenull=f span=1w dc(last_seen) AS count BY host