Let's divide 878121 by 75
The aim is to understand the frequency of 75 in 878121.

Step 1:
When dividing 8 by 75, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 75

Going ahead to step 2:
The number 75 fits into 87 1 times, leaving a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 75 away from 87, we end up with 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 75

Let's proceed to step 3:
The number 75 fits into 128 1 times, leaving a remainder of 53.
The next digit of our result is 1. 
Result so far: 11.0
Deduct 75 from 128 and we're left with 53.
Include the next digit (1) from the dividend after 53, then repeat: 531 / 75

Step 4:
531 divided by 75 is 7 with a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 117.0
If we take 525 away from 531, we end up with 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 75

Step 5:
75 can be fit into 62 0 times, resulting in a remainder of 62.
Put 0 as the next digit of the answer. 
Result so far: 1170.0
The remainder is 62 after subtracting 0 from 62.
Fetch the next digit (1) from the dividend, attach it to 62 and continue: 621 / 75

Advancing to step 6:
If we divide 621 by 75, we get 8 and a remainder of 21.
Write down 8 as next digit of the result. 
Result so far: 11708.0
Subtract 600 from 621 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
When dividing 210 by 75, we get 2 with a remainder of 60.
Write down 2 as next digit of the result. 
Result so far: 11708.2
If we take 150 away from 210, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 8:
75 goes into 600 8 times with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 11708.28
Deduct 600 from 600 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
The number 75 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 11708.28
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
75 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 11708.28
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 11708.28 with a balance of 0.0.