We look at the division of 75029651 by 987 
The aim is to understand the frequency of 987 in 75029651.

On to step 1:
7 divided by 987 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 987

Advancing to step 2:
75 divided by 987 is 0 with a remainder of 75.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 75 after subtracting 0 from 75.
Fetch the next digit (0) from the dividend, attach it to 75 and continue: 750 / 987

Going ahead to step 3:
987 goes into 750 0 times with a remainder of 750.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 750 after subtracting 0 from 750.
Bring next digit (2) of the dividend behind the 750 and repeat the process: 7502 / 987

On to step 4:
987 goes into 7502 7 times with a remainder of 593.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 593 after subtracting 6909 from 7502.
Include the next digit (9) from the dividend after 593, then repeat: 5939 / 987

Moving on to step 5:
987 can be fit into 5939 6 times, resulting in a remainder of 17.
Put 6 as the next digit of the answer. 
Result so far: 76.0
Subtracting 5922 from 5939 leaves us with 17.
Bring next digit (6) of the dividend behind the 17 and repeat the process: 176 / 987

Let's proceed to step 6:
987 can be fit into 176 0 times, resulting in a remainder of 176.
Use 0 as the next digit of our solution. 
Result so far: 760.0
The remainder is 176 after subtracting 0 from 176.
Grab the next digit (5) from the dividend, add it to 176, then carry on: 1765 / 987

Let's proceed to step 7:
The number 987 fits into 1765 1 times, leaving a remainder of 778.
Use 1 as the next digit of our solution. 
Result so far: 7601.0
If we take 987 away from 1765, we end up with 778.
Grab the next digit (1) from the dividend, add it to 778, then carry on: 7781 / 987

On to step 8:
When dividing 7781 by 987, we get 7 with a remainder of 872.
Record the quotient 7 as the next digit in the result. 
Result so far: 76017.0
Subtract 6909 from 7781 to get 872.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8720, and continue the process.

On to step 9:
987 goes into 8720 8 times with a remainder of 824.
The number 8 becomes the next digit in our result. 
Result so far: 76017.8
If we take 7896 away from 8720, we end up with 824.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8240, and continue the process.

On to step 10:
When dividing 8240 by 987, we get 8 with a remainder of 344.
Record the quotient 8 as the next digit in the result. 
Result so far: 76017.88
If we take 7896 away from 8240, we end up with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

The final outcome is 76017.88, with a leftover of 0.344.