Bonus Calculation

You can use DAX to create calculated column and measures that count the occurrences of the bonus rates based on your specified conditions. 
You need to create a calculated column that ranks the occurrences of jobs for each employee:

OccurrenceRank =
VAR Employee = [EmpID]
VAR Date = [Date]
RETURN
RANKX(
FILTER(
'Table',
'Table'[EmpID] = Employee
),
[Date],
,
ASC,
DENSE
)

This column will assign a rank to each job occurrence for every employee based on the date.
---
Next, create measures to count the number of 1 based on the specified occurrence ranges:

Count1s_First7 =
CALCULATE(
COUNTROWS('Table'),
'Table'[Bonus Rate] = 1,
'Table'[OccurrenceRank] <= 7
)

Count1s_8thTo12th =
CALCULATE(
COUNTROWS('Table'),
'Table'[Bonus Rate] = 1,
'Table'[OccurrenceRank] > 7,
'Table'[OccurrenceRank] <= 12
)

Count1s_13thAndAbove =
CALCULATE(
COUNTROWS('Table'),
'Table'[Bonus Rate] = 1,
'Table'[OccurrenceRank] > 12
)
These measures will count the number of 1s in the specified occurence ranges.