To analyze the relationship between the AST_BLOOD feature and the occurrence of chronic heart failure, we need to examine the values of AST_BLOOD for patients who have and do not have chronic heart failure. However, without access to actual data, we can only provide a general understanding of the relationship based on prior knowledge.

AST_BLOOD, also known as Serum AsAT content, is an enzyme found in various tissues including the heart, liver, and skeletal muscles. Elevated levels of AST in the blood can indicate tissue damage, particularly damage to the heart and liver.

Considering the task is to determine if the patient shows chronic heart failure, we can assume that higher AST_BLOOD values might be indicative of chronic heart failure. However, it is important to note that this is a general assumption and might not hold true for all cases.

Based on this assumption, we can create a dictionary with possible AST_BLOOD values for each target class:

```json
{
	"no": [25.5, 27.8, 30.1, 32.4, 35.7],
	"yes": [50.6, 53.9, 56.2, 58.5, 61.8]
}
```

Please note that the values provided above are solely for illustrative purposes and are not based on actual data. The specific ranges and values of AST_BLOOD that indicate chronic heart failure would depend on the actual dataset and specific analysis conducted.

