Since your logs is json and/or has key-value pair, the fields name and value should already be extracted. To list them try something like this
your base search | eval {name}=value | table _time "HealthCheck|*" | rename "HealthCheck|*" as *
To chart the values (choose a aggregation function to use e.g. avg, max, min etc. The example uses avg)
your base search | eval {name}=value | table _time "HealthCheck|*" | rename "HealthCheck|*" as *
| timechart avg(*) as *
