autovacuum freeze recommendations at table level

Could you please let me know that how this freeze parameters work

Update query runs on table  through which data being modified daily in this case

Total records in table is about 20lakhs

current setting for this table is 

Access method: heap

if it reaches > 0.1*2000000+1000 = 2,10,000 as per the formula autovacuum triggers
Options: fillfactor=85, autovacuum_vacuum_cost_delay=0, autovacuum_vacuum_cost_limit=3000, parallel_workers=6, autovacuum_vacuum_scale_factor=0.1, autovacuum_vacuum_threshold=1000, autovacuum_freeze_max_age=20000000, autovacuum_multixact_freeze_max_age=20000000, autovacuum_freeze_min_age=0

How autovacuum freeze parameters work.Give me some recommendations to improve the performance better than now 

Ex :ALTER TABLE table SET (
   autovacuum_freeze_max_age = 20000000,(2 crores)
   autovacuum_multixact_freeze_max_age = 20000000,(2 crores)
   autovacuum_freeze_min_age = 0
);
Regards,

Durga Mahesh