We're dividing 78591399 by 528 
The aim is to understand the frequency of 528 in 78591399.

Step 1:
528 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 528

Step 2:
The number 528 fits into 78 0 times, leaving a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Include the next digit (5) from the dividend after 78, then repeat: 785 / 528

Going ahead to step 3:
The number 528 fits into 785 1 times, leaving a remainder of 257.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 528 from 785 and we're left with 257.
Append the next digit (9) from the dividend to 257 and continue with: 2579 / 528

Let's proceed to step 4:
The number 528 fits into 2579 4 times, leaving a remainder of 467.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 467 after subtracting 2112 from 2579.
Bring next digit (1) of the dividend behind the 467 and repeat the process: 4671 / 528

On to step 5:
4671 divided by 528 is 8 with a remainder of 447.
The number 8 becomes the next digit in our result. 
Result so far: 148.0
Subtracting 4224 from 4671 leaves us with 447.
Include the next digit (3) from the dividend after 447, then repeat: 4473 / 528

Moving on to step 6:
528 can be fit into 4473 8 times, resulting in a remainder of 249.
Put 8 as the next digit of the answer. 
Result so far: 1488.0
If we subtract 4224 from 4473, we get 249.
Append the next digit (9) from the dividend to 249 and continue with: 2499 / 528

Moving on to step 7:
If we divide 2499 by 528, we get 4 and a remainder of 387.
The number 4 becomes the next digit in our result. 
Result so far: 14884.0
Deduct 2112 from 2499 and we're left with 387.
Grab the next digit (9) from the dividend, add it to 387, then carry on: 3879 / 528

Advancing to step 8:
If we divide 3879 by 528, we get 7 and a remainder of 183.
Use 7 as the next digit of our solution. 
Result so far: 148847.0
Subtract 3696 from 3879 to get 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

On to step 9:
If we divide 1830 by 528, we get 3 and a remainder of 246.
Use 3 as the next digit of our solution. 
Result so far: 148847.3
If we take 1584 away from 1830, we end up with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

On to step 10:
528 can be fit into 2460 4 times, resulting in a remainder of 348.
Record the quotient 4 as the next digit in the result. 
Result so far: 148847.34
The remainder is 348 after subtracting 2112 from 2460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Advancing to step 11:
528 goes into 3480 6 times with a remainder of 312.
Write down 6 as next digit of the result. 
Result so far: 148847.346
Deduct 3168 from 3480 and we're left with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Let's proceed to step 12:
528 can be fit into 3120 5 times, resulting in a remainder of 480.
Record the quotient 5 as the next digit in the result. 
Result so far: 148847.3465
If we take 2640 away from 3120, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 13:
If we divide 4800 by 528, we get 9 and a remainder of 48.
Use 9 as the next digit of our solution. 
Result so far: 148847.34659
Deduct 4752 from 4800 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 14:
The number 528 fits into 480 0 times, leaving a remainder of 480.
Record the quotient 0 as the next digit in the result. 
Result so far: 148847.34659
Subtract 0 from 480 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Moving on to step 15:
4800 divided by 528 is 9 with a remainder of 48.
Use 9 as the next digit of our solution. 
Result so far: 148847.3465909
The remainder is 48 after subtracting 4752 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 16:
When dividing 480 by 528, we get 0 with a remainder of 480.
Write down 0 as next digit of the result. 
Result so far: 148847.3465909
Subtracting 0 from 480 leaves us with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Our division results in 148847.3465909 with a remaining 4.8e-07.