Among the weekly issuance accounts, how many have a loan of under 200000?
frequency = 'POPLATEK TYDNE' stands for weekly issuance
SELECT COUNT(T1.account_id) FROM loan AS T1 INNER JOIN account AS T2 ON T1.account_id = T2.account_id WHERE T2.frequency = 'POPLATEK TYDNE' AND T1.amount < 200000