This is the 7802nd most frequent Korean word.
항암치료를
"항암치료를" means "anticancer treatment" or "chemotherapy."
The word '항암치료를' is used as the object of the verb '받으시다' to indicate the treatment being received.
할머니는 항암치료를 받으시고 계세요.
Grandmother is undergoing anti-cancer treatment.
Here, '항암치료를' is the object of the purpose clause '위한 시설을 제공하다', emphasizing the treatment as the purpose.
병원에서는 항암치료를 위한 시설을 제공하고 있습니다.
The hospital is providing facilities for anti-cancer treatment.
In this sentence, '항암치료를' is used as the instrument by which the action '깨닫다' (realize) occurs.