We're dividing 37574869 by 987 
The aim is to understand the frequency of 987 in 37574869.

On to step 1:
When dividing 3 by 987, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 987

Going ahead to step 2:
When dividing 37 by 987, we get 0 with a remainder of 37.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 37, we get 37.
Take the next digit (5) from the dividend and append it to 37, then repeat: 375 / 987

Advancing to step 3:
The number 987 fits into 375 0 times, leaving a remainder of 375.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 375 leaves us with 375.
Bring next digit (7) of the dividend behind the 375 and repeat the process: 3757 / 987

On to step 4:
3757 divided by 987 is 3 with a remainder of 796.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 2961 away from 3757, we end up with 796.
Append the next digit (4) from the dividend to 796 and continue with: 7964 / 987

Going ahead to step 5:
987 goes into 7964 8 times with a remainder of 68.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
Subtracting 7896 from 7964 leaves us with 68.
Append the next digit (8) from the dividend to 68 and continue with: 688 / 987

On to step 6:
If we divide 688 by 987, we get 0 and a remainder of 688.
The number 0 becomes the next digit in our result. 
Result so far: 380.0
If we take 0 away from 688, we end up with 688.
Fetch the next digit (6) from the dividend, attach it to 688 and continue: 6886 / 987

Going ahead to step 7:
987 goes into 6886 6 times with a remainder of 964.
The number 6 becomes the next digit in our result. 
Result so far: 3806.0
Subtract 5922 from 6886 to get 964.
Bring next digit (9) of the dividend behind the 964 and repeat the process: 9649 / 987

Let's proceed to step 8:
When dividing 9649 by 987, we get 9 with a remainder of 766.
Use 9 as the next digit of our solution. 
Result so far: 38069.0
If we take 8883 away from 9649, we end up with 766.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7660, and continue the process.

Let's proceed to step 9:
When dividing 7660 by 987, we get 7 with a remainder of 751.
Use 7 as the next digit of our solution. 
Result so far: 38069.7
Deduct 6909 from 7660 and we're left with 751.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7510, and continue the process.

On to step 10:
987 can be fit into 7510 7 times, resulting in a remainder of 601.
Record the quotient 7 as the next digit in the result. 
Result so far: 38069.77
Deduct 6909 from 7510 and we're left with 601.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6010, and continue the process.

After the division, we end up with 38069.77 and a remainder of 0.601.