DOSING INTERVAL.

 The dosing interval refers to the time interval between each dose of medication or treatment. In written British English, you can express the dosing interval using the following phrases:

1. "Take the medication every X hours." For example, "Take the medication every four hours."

2. "Administer the treatment every X hours." For instance, "Administer the treatment every two hours."

3. "Give a dose of medication every X hours." For example, "Give a dose of medication every six hours."

4. "Repeat the dosage every X hours." For instance, "Repeat the dosage every eight hours."

5. "Space out the doses every X hours." For example, "Space out the doses every three hours."

Remember to replace "X" with the specific number of hours that should pass between each dose.