Based on my prior knowledge, I understand that pdays represents the number of days that have passed since the client was last contacted from a previous campaign. For clients who have not subscribed to a term deposit, we can expect that the pdays value will likely be higher, indicating that they have not been recently contacted. Conversely, for clients who have subscribed to a term deposit, we can expect that the pdays value will likely be lower, indicating a more recent contact.

Here is the dictionary with the pdays values for each target class:

```json
{
    "no": [999.0, 998.0, 997.0, 996.0, 995.0],
    "yes": [0.0, 1.0, 2.0, 3.0, 4.0]
}
```

For the "no" target class, typical pdays values could be 999.0, 998.0, 997.0, 996.0, and 995.0. These values indicate that the clients have not been contacted for quite a long time.

For the "yes" target class, typical pdays values could be 0.0, 1.0, 2.0, 3.0, and 4.0. These values indicate that the clients have been contacted recently, possibly leading them to subscribe to a term deposit.